The chair umpire is the official who conducts an individual tennis match from the raised chair. The referee or tournament supervisor has broader authority over the event, while the chief umpire manages the on-court officiating team. Line umpires, review officials, match assistants, and roving umpires may also be used depending on the competition and technology available.
These titles are not interchangeable. A chair umpire decides what happened in one match and makes the first ruling on tennis law. The referee or supervisor is the final on-site authority for interpreting the applicable rules and tournament regulations.
Tennis Officials at a Glance
| Official | Main responsibility | Usual location | Scope of authority |
|---|---|---|---|
| Chair umpire | Conducts one match, calls the score, controls time, and applies rules and conduct procedures | On court in the chair | Questions of fact in that match and the first decision on questions of law |
| Line umpire | Watches assigned lines and makes line, service-fault, or foot-fault calls | On court | The assigned line or duty, subject to prompt overrule under the applicable procedure |
| Referee or supervisor | Oversees competition and resolves questions of law or regulation | Around the tournament site | Final on-site authority within the applicable event rules |
| Chief umpire | Recruits, trains, schedules, and evaluates on-court officials | Around the site | Management of the officiating team, under the referee or supervisor |
| Review official | Operates or monitors an approved electronic review process | Review area | Supplies the authorized review result and system information |
| Match assistant | Supports match operations where live electronic line calling replaces line umpires | On or near court | Assigned practical duties, not the chair umpire’s match authority |
| Roving umpire | Supervises courts without a dedicated chair umpire | Moves between courts | Authority defined by the tournament or national association |
The exact staffing plan varies. A local event may use player line calls and a roving official, while a major professional court may use a chair umpire, live electronic line calling, review personnel, and match assistants.
What Does a Tennis Chair Umpire Do?
A chair umpire is responsible for conducting one match under the Rules of Tennis, the event regulations, and the applicable officiating procedures. The work starts before the first point and continues after the result is complete.
Before the match
The chair umpire normally:
- checks the court, net, balls, score equipment, and other match provisions
- confirms the players or teams
- meets the on-court officiating crew when one is assigned
- explains relevant conditions of play when required
- conducts the coin toss
- times the warm-up
The coin-toss winner may choose to serve, receive, or select an end, or may require the opponent to make one of those choices. The remaining choice then goes to the other player or team under the rules.
During the match
The chair umpire keeps the score and ensures that the correct server, receiver, and ends are used. They time the permitted intervals, announce the score, manage ball changes, apply the Code of Conduct, and deal with interruptions.
Other responsibilities can include:
- making line calls when no line umpire or live system covers them
- correcting a clear line-umpire error under the overrule procedure
- deciding whether a ball bounced twice or touched a player
- determining whether a hindrance occurred
- making the first ruling when a question of tennis law arises
- calling the referee or supervisor when a player makes a valid appeal on a question of law
- deciding whether play can continue safely while seeking the appropriate event authority when necessary
- coordinating electronic review or video review procedures where approved
The chair also manages player conduct. The guide to tennis code violations explains the detailed penalty categories and escalation without repeating them here.
After the match
The chair confirms the final score, completes the scorecard or electronic record, returns tournament materials, and reports any conduct penalties or unusual incidents through the event’s required process.
The job is therefore much more than announcing “15-love.” It combines rules knowledge, observation, timing, administration, and communication under pressure.
Chair Umpire vs Referee vs Tournament Supervisor
The most important distinction is scope. A chair umpire controls one match; a referee or supervisor oversees the competition.
Chair umpire
The chair decides questions of fact in the match and makes the first decision on questions of law. They do not normally leave the chair to supervise other courts, alter the draw, or run the tournament schedule.
Referee
The referee is an off-court official with event-wide responsibility for the application of tennis law and competition regulations. At many events, the referee oversees draws, order of play, court assignments, officiating, and disputes that extend beyond one match.
Tournament supervisor
Professional tours and ITF events often use the title supervisor for the senior on-site rules authority. Current ITF World Tennis Tour regulations describe the supervisor as responsible for all aspects of play and the final on-site authority on the applicable regulations, Code of Conduct, Rules of Tennis, and duties and procedures.
Depending on the event, “referee” and “supervisor” may describe separate posts or closely related senior functions. The event regulations determine the official title and authority, so the terms should not be treated as universally identical.
Chief umpire
The chief umpire manages the people who work on court. Duties can include recruitment, training, daily assignments, rotations, attendance, evaluation, and replacing an official when necessary.
The chief works with the referee or supervisor but does not replace that official as the final authority on tournament law and regulations.
Questions of Fact and Questions of Law
Understanding the difference explains when a player can seek another official.
Question of fact
A question of fact asks what physically occurred. Examples include:
- whether a ball was in or out
- whether the ball bounced twice
- whether a player touched the net
- whether a ball touched a player
- whether an action caused a hindrance
The chair umpire’s decision on a question of fact is final under ordinary procedure, except where an approved electronic or video-review system provides a defined review route. A player cannot convert disagreement with a factual judgment into an appeal on tennis law.
Question of law
A question of law asks which rule applies or how it should be interpreted. Examples include using the wrong scoring format, applying a penalty incorrectly, or misunderstanding the order required after a correction.
The chair umpire makes the first ruling. A player who disagrees may request the referee or supervisor, but the appeal must be made through the applicable procedure and before play moves beyond the point at which the issue can be corrected.
The senior official considers the law, not a fresh version of the facts. The complete playing framework is covered in the tennis rules guide.
What Does a Line Umpire Do?
A line umpire watches an assigned line and calls a ball out when it misses that line. A ball touching any part of the line is good.
Assignments can also include service faults, center-service-line calls, and foot faults. The exact position and responsibility depend on the crew configuration and the approved duties for the event.
If an official cannot see the landing clearly, the correct response is an unsighted signal rather than a guess. The chair umpire then follows the applicable procedure.
“Linesman” and “line judge” remain common informal expressions, but line umpire is the official title used in current tennis procedures.
Can a Chair Umpire Overrule a Line Umpire?
Yes. Under current ITF procedures, a chair umpire may overrule a line umpire only when the original call was a clear error, and the correction must be made promptly.
For example, if a line umpire calls “out” and the chair clearly sees the ball touch the line, the chair can announce a correction and rule the ball good. If the chair did not clearly see an error, the original call stands unless an approved review process applies.
A player’s protest is not evidence by itself. Players may ask whether the chair clearly saw the ball, but they cannot require an overrule simply by arguing forcefully.
When a call changes from out to good, the point outcome depends on whether the original call interfered with the opponent and whether the shot was an unretrievable winner under the applicable rules. That is a procedural decision for the chair, not an automatic replay in every case.
Referee and Supervisor Responsibilities
The senior on-site official works at tournament level rather than following one match from first point to last. Depending on the event, responsibilities may include:
- applying tournament regulations and conditions of play
- approving draws and dealing with vacancies or withdrawals
- creating or supervising the order of play
- assigning courts and managing schedule changes
- deciding whether conditions permit play
- overseeing officiating appointments with the chief umpire
- responding to questions of law from match courts
- applying or reviewing conduct procedures within the authority granted by the event rules
- documenting significant decisions and incidents
Not every referee personally performs every administrative task. Large events divide operations among a tournament director, supervisor, referee team, chief umpire, competition staff, and other specialists.
What Does a Chief Umpire Do?
The chief umpire builds and manages the daily on-court crew. Before the event, this can involve confirming availability and certification, planning training, and preparing assignments.
During the tournament, the chief monitors performance, organizes rotations and breaks, handles replacements, and gives feedback. The role is operational and developmental: matches need the right number and level of officials in the right places.
At events using live electronic line calling, the staffing mix changes. A chief may coordinate match assistants and other personnel instead of a traditional line crew.
Roving Umpires and Unofficiated Matches
Many junior, collegiate, club, and national events do not put a chair umpire on every court. Players may call their own lines while a roving umpire monitors several matches.
The roving official may:
- settle score disputes using the event procedure
- make calls when directly observing the relevant play
- enforce warm-up, rest, and timing rules
- handle misconduct
- monitor spectators and coaches
- call foot faults where authorized
Authority varies by national association and competition. A local roving procedure should not be assumed to match the duties of an ITF chair umpire.
Players in self-officiated matches still need to know the score and changeovers. The tennis scoring guide provides that foundation without turning this page into a scoring lesson.
Electronic Line Calling and Review Officials
Electronic line calling is used in more professional events than it was a few years ago, but it has not replaced line umpires throughout tennis.
Review electronic line calling
Under a review system, the original call is made on court and a player may request an electronic review under the event’s approved procedure. A review official monitors the technology and communicates the result.
Live electronic line calling
Live electronic line calling automatically makes line calls without a traditional line-umpire crew on that court. The ATP adopted tour-wide live electronic line calling beginning in 2025, and Wimbledon introduced it on all match courts in the same year.
The chair umpire remains essential. Technology does not keep the score, apply the Code of Conduct, decide every hindrance or double bounce, manage timing, or interpret all tennis law.
Video review
Video review is separate from line calling. Where an event approves it, video may be available for specified judgment calls such as double bounces, net touches, or hindrances. Availability and reviewable incidents depend on the competition.
In 2026, video-review use continues to expand at selected top-level events, but it is not a universal tennis procedure. A match must follow the system authorized for that court and event.
Match assistants
Events using live line calling may assign match assistants for practical on-court tasks formerly supported by a line crew. The exact responsibilities depend on event procedures. A match assistant does not replace the chair umpire as the official conducting the match.
How to Become a Tennis Official
The usual first step is the applicant’s national tennis association, not the ATP, WTA, or a Grand Slam. National requirements vary and may include rules courses, safeguarding, vision standards, background checks, membership, shadowing, and on-court assessments.
A typical pathway is:
- Contact the national association’s officiating department.
- Complete the required introductory education.
- Meet eligibility, safeguarding, and vision requirements.
- Shadow or assist experienced officials.
- Work local and national events.
- Receive evaluations and complete role-specific training.
- Apply for higher certification when the experience requirements are met.
An official can later specialize as a chair umpire, referee, chief umpire, or line umpire. Experience in one role helps, but each has distinct procedures and assessment standards.
ITF Certification Levels
The ITF and the professional tours operate a joint certification program. The current school structure includes National, Level 1 (Green Badge), Level 2 (White Badge), and Level 3, with higher role-specific badges awarded through the international program. Passing a White Badge school does not itself confer international-official status; that status begins after an official passes Level 3.
| Stage | General scope | What advancement depends on |
|---|---|---|
| National certification | Local and national competition under the association’s system | Courses, tests, practical work, and national evaluations |
| Green Badge (Level 1, chair umpire only) | An ITF Level 1 route taught and examined in Spanish or French | School requirements and assessed competence |
| White Badge (Level 2) | ITF certification that can make an official eligible to apply for Level 3; it is not international status | Rules knowledge, practical performance, language, and evaluation |
| Bronze, Silver, and Gold Badges | International status begins after passing Level 3; later assignments and promotion are role-specific | Sustained performance, experience, evaluations, and joint-program decisions |
The label alone does not guarantee an assignment. Tournament needs, recent evaluations, role, availability, language, travel, and governing-body appointments all matter.
Certification details can change. Applicants should use the current national association and ITF officiating information rather than an old forum post or a historical badge chart.
Skills a Tennis Official Needs
Rules knowledge is essential, but professional conduct is equally important.
Strong officials develop:
- concentration over long matches and days
- clear, neutral announcements
- accurate score and time management
- calm conflict handling
- decisive but proportionate communication
- awareness of court and player safety procedures
- teamwork with other officials and event staff
- written reporting and administrative accuracy
- fitness appropriate to the assigned role and conditions
An official should explain a ruling briefly and clearly without entering an extended debate. Consistency and neutrality build more credibility than volume.
Do Tennis Umpires Get Paid?
Many certified officials receive payment for tournament assignments, but there is no universal salary or daily rate for “a tennis umpire.” Arrangements depend on the country, governing body, certification, role, event level, contract status, number of days, and whether travel, accommodation, or meals are provided separately.
| Assignment context | Common payment structure | Variables to confirm before accepting |
|---|---|---|
| Local or club event | Daily fee, session fee, expense reimbursement, or volunteer assignment | Hours, travel, meals, and association policy |
| National tournament | Daily or event fee under the organizer or association | Role, badge level, schedule, accommodation, and expenses |
| International event | Assignment fee plus specified travel or subsistence arrangements | Governing body, contract, destination, role, and event duration |
| Tour or major event | Event-specific appointment terms | Certification, seniority, travel, accommodation, and assigned duties |
Public estimates from different countries and years should not be combined into one salary range. Anyone considering an assignment should obtain the current written terms from the organizer or appointing body.
How Officials Work Together During a Dispute
A routine sequence looks like this:
- The chair umpire makes or confirms the decision.
- The player asks for clarification.
- The chair explains whether the issue is fact or law.
- A factual decision remains with the chair or approved review system.
- A timely legal appeal is referred to the referee or supervisor.
- The senior official decides the interpretation and play resumes.
This structure prevents every disagreement from stopping the tournament while still providing a route for genuine rules questions. Doubles can add serving-order and partner issues, which are covered in the tennis doubles rules guide.
Frequently Asked Questions
What is a tennis referee called?
The official in the raised chair is the chair umpire. Referee is a separate event-level role, although spectators often use the word informally for the chair.
Who has the final say in a tennis match?
The chair umpire has final authority on ordinary questions of fact in that match, subject to approved review procedures. The referee or supervisor is the final on-site authority on questions of tennis law and applicable tournament regulations.
Can an umpire change a call after the next point starts?
Officiating procedures require corrections and appeals to be timely. Once play has continued beyond the permitted point, many decisions can no longer be reopened. The exact response depends on the issue and event rules.
Are line umpires still used?
Yes. Live electronic line calling has removed line crews from some major professional courts, but human line umpires remain in competitions and locations where the technology is not used.
Does electronic line calling replace the chair umpire?
No. It addresses line decisions. The chair still conducts the match, announces the score, manages timing and conduct, and decides issues outside the system’s authorized scope.
Can anyone become a tennis umpire?
Applicants must meet the requirements of their national association, which may include education, membership, safeguarding, vision, and practical assessment. International appointments require further experience and certification.
Is the tournament director an official?
The tournament director manages the event’s commercial and operational organization but is not automatically the final rules authority. The referee or supervisor controls competition-law matters under the applicable regulations.
Tennis officiating is a team structure. The chair umpire owns the match, the referee or supervisor owns event-wide rules authority, the chief manages the officiating workforce, and other officials supply the observations and technology support needed for fair play.