A tiebreak changes the point count, not the service rotation.

The rule and version used here

This page applies the ITF Rules of Tennis 2026, especially Rules 5–7, 10, 14–15 and 27, and Appendix VI, “Alternative Procedures and Scoring Methods.” The ITF is the international governing body for the rules of tennis; its public-facing organization is now branded World Tennis, while the rulebook retains the ITF name.

The ITF sets the available scoring machinery, but it does not impose one match format on every competition. The sanctioning body or tournament must announce the set method, number of sets and any approved alternatives. Separate panels below identify the 2026 Grand Slam, ATP and WTA choices rather than presenting them as universal tennis rules.

Points win games; games win sets; sets win the match

1. Game: the server's score is called first—love, 15, 30, 40, game—subject to deuce.
2. Set: games are counted numerically. A standard set normally goes to six games with a two-game margin; the announced set method decides what happens at 6-6.
3. Match: under ITF Rule 7, a best-of-three match requires two sets and a best-of-five match requires three. A competition may use an approved match tiebreak in place of the deciding set.

A scoreboard such as 6-4, 3-6, [10-7] therefore shows two completed sets followed by a match tiebreak, not a third set that reached ten games.

Deuce requires two consecutive points

ITF Rule 5(a) calls 40-40 “Deuce.” The next point gives that player or team “Advantage”; winning the following point wins the game, while losing it returns the score to deuce. There is no fixed maximum number of points in a standard advantage game.

No-ad is an approved alternative, not the default. Under Appendix VI, one deciding point is played at deuce. The receiver chooses the right or left service court; in doubles the receiving pair may not change positions for that point. Mixed doubles uses the same-gender receiver specified by the appendix. The event regulations must say that no-ad applies.

6-6 does not always produce the same ending

ITF Rule 6 recognizes two main methods, which must be announced in advance:

• Tie-break set: first to six games by two; at 6-6, play a tiebreak. The standard Rule 5 tiebreak is first to seven points by two.
• Advantage set: first to six games by two, with no tiebreak. At 6-6, games continue until one player or team leads by two.

If a competition uses tie-break sets, it must also announce whether the final set is a tie-break set or an advantage set. Appendix VI additionally permits short sets and 7-point or 10-point match tiebreaks, so “six games all” is not enough information without the conditions of play.

First to seven, but always by two

ITF Rule 5(b) replaces love–15–30–40 with zero, 1, 2, 3 and so on. The first player or team to reach at least seven with a two-point lead wins the tiebreak and set. Thus 7-5 finishes it; 7-6 does not, and play could finish 8-6, 10-8 or later.

The first point is served from the right half of the court. Service courts then alternate point by point. A set tiebreak won after a 6-6 game score produces a 7-6 set; the smaller number commonly shown in brackets is the losing side's tiebreak-point total, not another game.

One serve, then blocks of two

1. The player whose turn it is to serve serves point 1.
2. The opponent serves points 2 and 3.
3. The first player serves points 4 and 5.
4. Service continues in alternating two-point blocks until the tiebreak ends.

The one-point opening block is what keeps the ordinary game-by-game service rotation intact. The player or team that served first in the tiebreak receives in the first game of the next set. A change of ends does not alter this sequence.

Both rotations still matter

For an ordinary set tiebreak, the team due to serve starts it and the partner due next in that set serves the team's turn. The four-player service rotation continues in the same order used during the set. The receiving order likewise remains the order chosen for that set.

A match tiebreak that replaces a deciding set is treated differently because it begins in place of a new set. Appendix VI keeps the team-level service sequence, but each doubles team may choose its internal serving and receiving order as it could at the start of any set. Do not automatically carry the partners' second-set order into the match tiebreak.

The ITF default is every six tiebreak points

ITF Rule 10 requires players to change ends after every six points in a tiebreak, without a rest period under Rule 29. Appendix VI also authorizes an alternative procedure—change after the first point and then every four points—but that only applies when the competition adopts it.

A suspension does not reset anything: Appendix VII says the score and the players' on-court positions stand when play resumes. For ball changes, Rule 3 counts a tiebreak as one game but delays a ball change that would otherwise fall at its start until the second game of the next set.

Three different “tiebreak to 10” situations

• Standard set tiebreak: played at 6-6 in a tie-break set; normally first to 7 by two.
• Match tiebreak: played at one set all in best of three, or two sets all in best of five; it replaces the whole deciding set and may be first to 7 or 10 by two under Appendix VI.
• Final-set tiebreak to 10: the players first play the deciding set to 6-6, then play a first-to-10-by-two tiebreak. Appendix VI authorizes this separate format.

The decisive question is therefore not only “seven or ten?” but also whether the tiebreak wins a set already standing at 6-6 or substitutes for the entire deciding set.

Grand Slam, ATP and WTA formats

• Grand Slam Board, 2026: men's singles main-draw matches are best of five; all other matches are best of three unless the tournament determines otherwise. The final set uses the ITF 10-point tiebreak at 6-6. The individual Grand Slam's event regulations may specify draw-specific details.
• ATP, 2026 rulebook revised 27 April: ATP Tour and Challenger singles are best of three tie-break sets. Doubles uses two tie-break sets with no-ad games and a 10-point match tiebreak at one set all (Rule 1.02(B)). Grand Slams, Davis Cup and ITF events have their own controlling rules.
• WTA, rules current 27 July 2026: WTA main-draw and qualifying singles are best of three tie-break sets. Main-draw doubles uses no-ad in the first two sets and a 10-point match tiebreak as the third set (Tournament Standards, section 39). WTA reserves power to authorize alternatives, and Grand Slams choose under Grand Slam rules.

It begins like a new set, but no games are played

When an approved match tiebreak replaces the deciding set, Appendix VI provides a 120-second set break before it. The next team in the match service order serves first, using the ordinary one-then-two tiebreak pattern. In doubles, partners may reorder internally as at the start of a set.

Even if a scheduled ball change is due, new balls are not introduced before the match tiebreak. The target is at least 10 points with a two-point margin when the 10-point version applies: 10-8 ends the match, 10-9 does not.

Played points usually stand

ITF Rule 27 starts from one principle: when a rules error is discovered, points already played stand. The official then applies the specific correction:

• A wrong service court or wrong end is corrected as soon as discovered, with the next serve made from the court or end required by the score.
• If the wrong player serves in a tiebreak, correct immediately when the error is found after an even number of points; after an odd number, the altered order remains.
• If a tiebreak was mistakenly started in an agreed advantage set, stop and correct if only one point has been played. Once the second point is in play, continue as a tie-break set.
• If a standard game was mistakenly started at 6-6 in an agreed tie-break set, correct if only one point has been played. Once the second point is in play, continue as an advantage set until 8-8, or a later even game score, and then play the tiebreak.

The 2026 ITF amendment also clarifies that a fault served before discovering that players are at the wrong ends does not stand.

The tiebreak reaches 7-6

Situation: in an ITF 2026 standard tie-break set, Player A leads the tiebreak 7-6.

Ruling: continue. Rule 5(b) requires a two-point margin. If A wins the next point, A wins the tiebreak 8-6 and the set 7-6; if B wins, the point score becomes 7-7.

The first tiebreak server wins it 7-5

Situation: A serves point 1 and wins the tiebreak 7-5. Which player serves the first game of the next set?

Ruling: B serves; A receives. ITF Rule 5 expressly makes the player or team that served first in the tiebreak the next-set receiver. The change follows the match service rotation and is not determined by who served the final tiebreak point.

One set all in WTA doubles

Situation: a 2026 WTA main-draw doubles match is tied at one set each.

Ruling: play a 10-point match tiebreak as the third set, not a full third set. The WTA's rules current 27 July 2026 require no-ad scoring in the first two sets and this deciding format. The match tiebreak ends only with at least 10 points and a two-point lead.

6-6 in a Grand Slam deciding set

Situation: the deciding set of a 2026 Grand Slam singles match reaches 6-6.

Ruling: play a 10-point final-set tiebreak, win by two. This does not replace the final set: twelve games have already been played in it. The Grand Slam Board's 2026 rulebook applies the ITF rules and specifies a 10-point tiebreak in the final set.

How to read any tennis scoreboard

1. Name the competition and draw. Singles, doubles, mixed doubles, qualifying and junior draws can differ.
2. Find the effective conditions of play. Check number of sets, advantage or no-ad games, set type and deciding-set format.
3. Identify the layer. Is the disputed number a point, game, set or match-tiebreak score?
4. At 6-6, apply the announced set method. Do not assume every set uses a tiebreak.
5. Track service independently. First server gets one point; then use two-point blocks and preserve the doubles rotation.
6. Check the target and margin. Seven or ten is only a minimum; the winner still needs two clear points.
7. If an error occurred, preserve completed points. Then apply the specific Rule 27 correction rather than replaying the tiebreak from zero.

Five claims to avoid

• “Every set goes to a tiebreak at 6-6.” An announced advantage set continues until a two-game lead.
• “First to seven always wins.” Seven is a minimum; the margin must be two.
• “A 10-point tiebreak is always the third set.” It may replace the set, or it may be played after the final set reaches 6-6.
• “The first tiebreak server serves twice.” That player serves only point 1; the next server takes points 2 and 3.
• “No-ad is just ordinary deuce with one fewer advantage.” It is one deciding point at deuce, with the receiving choice and doubles restrictions set by Appendix VI.

Governing-body sources and effective versions

• International Tennis Federation — Rules of Tennis 2026, Rules 3, 5–7, 10, 14–15 and 27; Appendices VI–VII
• International Tennis Federation — 2026 Amendments to the Rules of Tennis, Rule 27 clarification
• Grand Slam Board — 2026 Grand Slam Rule Book, Article I.K–L (Rules of Tennis; number of sets and tiebreak)
• ATP Tour — 2026 Official Rulebook, revision dated 27 April 2026, Rule 1.02(B)
• WTA Tour — 2026 Official Rulebook, current 27 July 2026, Tournament Standards section 39

Checked on 28 August 2026 against the ITF 2026 rulebook and amendment notice, plus the named 2026 competition rulebooks. The ITF rules supply the baseline; a tournament's current regulations and announced conditions of play can select approved alternatives or add draw-specific provisions.