Tennis has formal rule terms, coaching vocabulary, equipment language and plenty of unofficial slang. This glossary gives short, practical definitions so a new player can follow a lesson, scorecard, broadcast or equipment discussion without reading a full guide for every term.
For a basic orientation to the sport, start with What Is Tennis? An Intro to the Sport. Use Tennis Rules Explained: The Ultimate Guide for complete rule situations and How The Scoring System Works In Tennis? for the full point-game-set sequence.
A
| Term | Meaning |
|---|---|
| Ace | A legal serve that the receiver does not touch before its second bounce. |
| Ad court | The left half of each player’s end of the court when facing the net. The serve to this side is played at 15–0, 30–15, 40–30 and other odd point totals in a standard game. |
| Ad in | Informal call meaning advantage server. |
| Ad out | Informal call meaning advantage receiver. |
| Advantage | The point won immediately after deuce. The same player or team must win the next point to win the game; otherwise the score returns to deuce. |
| All | A tied score below deuce, such as 15-all or 30-all. At 40-all, the normal call is deuce. |
| Alley | The strip between the singles and doubles sidelines, also called the doubles alley or tramline. It is part of the court in doubles but not singles. |
| Approach shot | A shot played while moving forward with the intention of taking a position near the net. |
| ATP | Association of Tennis Professionals, the organization behind the leading men’s professional tour, Challenger Tour and men’s rankings. |
B
| Term | Meaning |
|---|---|
| Backhand | A stroke played on the side where the back of the racket hand generally faces the direction of the shot. It may be hit with one or two hands. |
| Backspin | Backward rotation that generally produces a lower flight and lower forward bounce than topspin. Slice shots use backspin. |
| Bagel | Unofficial slang for a 6–0 set because the zero resembles a bagel. |
| Baseline | The line marking the back boundary at each end of the court. A serve begins from behind it. |
| Breadstick | Unofficial slang for a 6–1 set because the numeral one resembles a breadstick. |
| Break of serve | A game won by the player or team receiving serve. |
| Break point | A point on which the receiver can win the current game. |
| Bye | Advancement to a later round without playing a match in the earlier round, normally because of the draw structure. |
C
| Term | Meaning |
|---|---|
| Center mark | The short mark at the middle of each baseline that divides the legal serving positions for the deuce and ad courts. |
| Center service line | The line that divides the area between the service lines and net into left and right service courts. |
| Changeover | A scheduled change of court ends. Some changeovers include a rest period, while players change ends without a rest after the first game of a set and during specified tie-break intervals. |
| Chip | A short, compact shot commonly played with backspin. |
| Chip and charge | A sliced return or approach followed by an immediate move toward the net. |
| Closed stance | A hitting stance in which the front foot is placed more across the body relative to the target line. Stance labels describe positions, not mandatory technique. |
| Code violation | An officiating penalty for conduct governed by the applicable competition code, such as racket abuse or an audible obscenity. Penalty sequences depend on event rules. |
| Continental grip | A grip commonly used for serves, volleys, overheads and slice. The base knuckle of the index finger is placed around the second bevel for a right-handed reference. |
| Crosscourt | A shot traveling diagonally from one side of the court toward the other. |
The exact court lines and legal playing areas are shown in Tennis Court Dimensions and Size Guide.
D
| Term | Meaning |
|---|---|
| Default | Removal of a player or team from a match by an official under the applicable rules or code. It differs from retiring because of an inability to continue. |
| Deep | A ball that lands close to the opponent’s baseline. Deep does not necessarily mean hard. |
| Deuce | A standard-game score at which both sides have won three points or are tied again after advantage. Two consecutive points are then needed to win the game. |
| Deuce court | The right half of each player’s end when facing the net. The first point of a standard game is served to this court. |
| Double fault | Two consecutive service faults on the same point, causing the server to lose the point. |
| Doubles | Tennis played by teams of two, using the wider doubles court. |
| Down the line | A shot traveling roughly parallel to a sideline rather than diagonally across the court. |
| Draw | The tournament bracket showing entrants, pairings and routes through the rounds. |
| Drop shot | A softly played ball intended to land close to the net, commonly with backspin. |
E to H
| Term | Meaning |
|---|---|
| Error | A shot that loses the point by landing out, hitting the net without crossing or otherwise failing to make a legal return. Statistical classifications can distinguish forced and unforced errors. |
| Fault | An unsuccessful first or second serve. A first-service fault gives the server a second serve; a second consecutive fault loses the point. |
| First serve | The server’s first attempt to begin a point. |
| Flat shot | A shot hit with relatively little spin. “Flat” does not mean literally zero rotation in every case. |
| Follow-through | The racket and body movement that continues after contact. |
| Foot fault | A service fault caused by illegal foot position or movement under the service rule. |
| Forced error | A statistical judgment that an opponent’s effective shot substantially caused the error. It is not a separate result under the Rules of Tennis. |
| Forehand | A stroke played on the side where the palm of the racket hand generally faces the direction of the shot. |
| Game | A scoring unit made of points. In a standard game, a side must win at least four points and lead by two. |
| Game point | A point that would give the leading player or team the game. |
| Grand Slam | The Australian Open, Roland Garros, Wimbledon and US Open are the four Grand Slam tournaments. The phrase can also describe winning all four in the same discipline within one calendar year. |
| Groundstroke | A shot played after the ball has bounced, typically a forehand or backhand. |
| Half volley | A shot struck very shortly after the ball bounces. |
| Hindrance | An incident that interferes with a player while the ball is in play. Whether the point is replayed or awarded depends on the cause and applicable rule. |
| Hold serve | Win a game in which you or your team is serving. |
Inside-In Through Match Terms
| Term | Meaning |
|---|---|
| Inside-in forehand | A forehand hit from around the backhand side and directed down the same side of the court. |
| Inside-out forehand | A forehand hit from around the backhand side and directed diagonally toward the opponent’s opposite side. |
| ITF | International Tennis Federation, the international governing body responsible for the Rules of Tennis and a range of tours and team competitions. In 2026 its public brand also uses World Tennis. |
| Kick serve | A serve with substantial topspin or topspin-side spin that produces a higher, moving bounce. |
| Let | A situation in which a service or whole point does not count and is replayed under the rules. A service let does not erase an earlier fault. |
| Lob | A high shot intended to pass over an opponent near the net. |
| Love | Zero in tennis scoring. |
| Lucky loser | A player who lost in qualifying but enters the main draw when a place becomes available, under the event’s selection rules. |
| Main draw | The principal tournament bracket that follows any qualifying competition. |
| Match | The complete contest, usually decided by the first side to win the required number of sets. |
| Match point | A point that would win the match for the leading player or team. |
| Match tie-break | A tie-break played instead of a final set under an approved format, commonly to at least 10 points with a two-point margin. It is not the same as every deciding-set tie-break. |
| Mini-break | Informal term for winning a point served by the opponent during a tie-break. It is not a break of a full service game. |
N to R
| Term | Meaning |
|---|---|
| Net cord | The cable or cord supporting the top of the net, or a ball’s contact with the net assembly. During a rally, a ball can remain in play after touching the net if it otherwise makes a good return. |
| No-ad scoring | An approved format in which one deciding point is played at deuce. The receiving choice or procedure is set by the competition format. |
| Open Era | The period beginning in 1968, when major tournaments opened competition to professional as well as amateur players. |
| Open stance | A hitting stance in which the feet remain more nearly parallel to the baseline rather than stepping across into a closed stance. |
| Overhead | A shot struck above the head, often in response to a lob. It is also called a smash. |
| Overrule | An official’s correction of a call under the officiating procedures used for that match. |
| Passing shot | A ball hit past an opponent positioned near the net. |
| Poach | In doubles, a move by the net player across the middle to intercept a ball that might otherwise travel to the partner. |
| Point | The smallest scoring unit, beginning when a legal service puts the ball in play and ending when one side wins it. |
| Protected ranking | A special entry provision that may allow an eligible player returning after a qualifying absence to use a prior ranking for limited entry purposes. It is not a current ranking and does not automatically determine seeding. |
| Qualifier | A player who reaches the main draw by winning the required qualifying matches. |
| Rally | A sequence of legal shots exchanged after the serve. |
| Racket | The strung implement used to hit the ball. The Rules of Tennis set maximum dimensions and other construction limits. |
| Receiver | The player designated to return the serve, also called the returner. |
| Retirement | A match that began but ended because a player or team could not or chose not to continue. It differs from a walkover before play starts. |
| Return of serve | The receiver’s first shot after the serve bounces in the correct service court. |
| Round robin | A competition format in which entrants play several opponents within a group rather than being eliminated after one loss. Advancement rules vary by event. |
S
| Term | Meaning |
|---|---|
| Second serve | The attempt allowed after a first-service fault. If it is also a fault, the server loses the point. |
| Seed | A draw position assigned to a highly ranked entrant to distribute leading players through the bracket. A seed and a ranking are not the same thing. |
| Serve or service | The shot that puts a point into play by traveling diagonally into the correct service court. |
| Service box | Common term for one of the two service courts on each side of the net. |
| Service break | Another name for a break of serve. |
| Service line | The line parallel to the net that marks the back boundary of the service courts. |
| Set | A group of games. Under a standard tie-break set, the first side to six games with a two-game margin wins, with a tie-break at 6–6. Other approved formats exist. |
| Set point | A point that would win the set for the leading player or team. |
| Sideline | A line marking a long side boundary. Singles and doubles use different sidelines. |
| Singles | Tennis played by one player against one player, using the narrower singles court. |
| Singles stick | A support used to hold a doubles net at the correct height for singles play. |
| Slice | A shot played with backspin, normally producing a lower flight and bounce than topspin. |
| Smash | An overhead shot hit above head height, usually with an attacking downward trajectory. |
| Split step | A small hop or loading action timed to prepare movement in either direction as the opponent strikes. |
| Straight sets | Winning a match without losing a set, such as 2–0 in best-of-three or 3–0 in best-of-five. |
| String gauge | The thickness of a tennis string. A larger US gauge number usually denotes a thinner string, while millimeter measurements state diameter directly. |
| String pattern | The number and arrangement of main and cross strings, commonly described with counts such as 16 × 19. |
| Stringbed | The complete woven hitting surface formed by the main and cross strings. |
| Sweet spot | Informal term for the region of the stringbed that produces the most effective response for a given racket and impact. It is not one officially fixed point. |
Hand position and bevel terminology are covered in Tennis Grips Explained: How To Hold The Racket. Material families and their tradeoffs are explained in Different Types of Tennis Strings.
T to Z
| Term | Meaning |
|---|---|
| Tie-break | A game using numerical point scoring to decide a set under the announced format. A standard tie-break is won at seven or more points with a two-point margin. |
| Top seed | The player or team assigned the No. 1 seed in a draw. This is not necessarily a permanent world-ranking position. |
| Topspin | Forward rotation that helps a ball dip and generally produces a higher forward bounce. |
| Tramline | Another name for the doubles alley, especially in British usage. |
| Tweener | A shot hit between the legs, often while running back toward the baseline. |
| Unforced error | A judgment-based statistical label for an error not primarily forced by the opponent’s shot. It is not defined as a separate point outcome in the Rules of Tennis. |
| Unseeded | Entered in the draw without a seeded position. An unseeded player can still have a high ranking relative to the full field. |
| Volley | A shot hit before the ball bounces. The receiver may not volley the serve before it bounces. |
| Walkover | Advancement without a match beginning because an opponent withdraws or cannot play. It differs from a retirement after play starts. |
| Wild card | Entry into a draw granted under the event’s rules without using ordinary direct ranking acceptance or qualifying. |
| Winner | In match statistics, a point-ending shot credited as a winner under the data provider’s classification. Statistical definitions can vary. |
| WTA | Women’s Tennis Association, the organization behind the leading women’s professional tour and rankings. |
Scoring Phrases You May Hear
Commentators often compress the score into conversational shorthand.
| Phrase | Meaning |
|---|---|
| On serve | Neither side currently has a net service-break advantage in the set sequence |
| One break up | A player or team holds a net advantage of one service game, interpreted with the service order |
| Break back | Recover a service-break deficit by breaking the opponent |
| Consolidate the break | Hold in the service game immediately after breaking |
| Serve out the set | Serve while one hold away from winning the set |
| Serve out the match | Serve while one hold away from winning the match |
| Two sets to love | A 2–0 set score |
| Five games all | A 5–5 score within a set |
Equipment Language That Is Easy to Confuse
| Pair | Difference |
|---|---|
| Grip vs overgrip | Grip can mean the hand position or the base handle covering; an overgrip is the replaceable wrap placed over the base grip |
| Gauge vs tension | Gauge is string thickness; tension is the reference force used during installation |
| Head size vs racket length | Head size describes the stringbed area; length measures the racket from butt to tip |
| Balance vs weight | Weight is total mass; balance describes how that mass is distributed along the racket |
| Power vs control | Coaching and equipment terms describing performance tendencies, not standardized guarantees |
| Spin vs slice | Spin is any ball rotation; slice normally refers to a backspin shot |
How to Use This Glossary
Use the short definition to understand the immediate context, then move to the dedicated guide when the term affects how a match is played. The glossary is a map of tennis language, not a substitute for complete scoring, rules, court or equipment instructions.
That distinction matters because some phrases are formal rules while others are coaching cues, statistics or slang. When a competition decision is involved, the current Rules of Tennis and the event’s published regulations control over an informal expression.
Frequently Asked Questions
Why is zero called love in tennis?
The origin is not conclusively established. Several popular explanations exist, but “love” is simply the formal scoring word for zero today.
What does 15-all mean?
Both players or teams have won one point in the game. “All” means the score is tied.
What is the difference between a let and a fault?
A fault is an unsuccessful serve that counts as an attempt. A service let does not count, so that particular serve is replayed without erasing an earlier fault.
What is the difference between a walkover and a retirement?
A walkover occurs without the match starting. A retirement occurs after play has begun.
Is a mini-break an official service break?
No. It is informal tie-break language for winning a point served by the opponent. No full service game has been won.
Are forced and unforced errors official rules?
They are statistical classifications based partly on judgment. The point result is official, but the error label can differ between data providers.