Forty-all. One point later, the crowd erupts—or the game is still alive. That’s the delicious tension of tennis scoring: at the same score, the next point can either put a player just one step from winning the game or finish it outright. The difference comes down to one little rule choice: advantage scoring or no-ad scoring.
Here’s the key distinction before we get into the drama: an “advantage set” describes how a set is won, while “advantage” and “no-ad” describe how a game is scored. They’re related, but they aren’t opposites on the same level. Get those two layers straight and deuce becomes much easier to follow—whether you’re watching a Grand Slam, playing doubles, or trying to work out why a game refuses to end.
First, what does deuce mean?
A standard tennis game uses point scores of love (zero), 15, 30, and 40. If both players reach 40, the score is called deuce. From there, the game’s scoring format determines what happens next.
At deuce, the players are tied. Neither is yet one point from winning under traditional advantage scoring. In no-ad scoring, however, deuce is the starting line for a single, decisive point. That one rule changes the feel of the whole game.
How deuce works in advantage scoring
In a regular advantage game, a player must win two points in a row from deuce to take the game. The first point doesn’t win it. Instead, the point-winner earns advantage.
- If the server wins the point at deuce, the score is called “advantage server,” or “ad-in.”
- If the receiver wins it, the score is “advantage receiver,” or “ad-out.”
- The player with advantage wins the next point and takes the game.
- If the player with advantage loses the next point, the score returns to deuce.
So if Maya and Lena reach deuce, Maya wins the next point, and then Lena wins the one after that, the game is back at deuce. Maya hasn’t lost the game; Lena hasn’t won it. They have to go again.
This can repeat as many times as necessary. There’s no fixed number of points at deuce: the game ends when one player wins two consecutive points from a deuce position. That’s why a close service game can stretch into a nerve-rattling sequence of ad-in, deuce, ad-out, deuce, and more.
When does the next point decide an advantage game?
At advantage, the next point decides the game: the player with advantage wins the game if they take it. But at deuce, the next point decides only who gets advantage. That’s the simple rule to keep in your head.
The next point can also decide a game before deuce. If a player leads 40–30, they are one point from winning. If they’re receiving serve, that point is also a break point. A 40–15 or 40–love score gives the leader game points too. “Game point” means one point from winning the game; it does not mean the point is guaranteed to end it.
How deuce works in no-ad scoring
No-ad scoring removes the advantage stage. Once a game reaches deuce, the next point is a deciding point: whoever wins it wins the game. No ad-in. No ad-out. No return to deuce.
Imagine Maya and Lena are tied at 40–40. Under advantage scoring, Maya could win the next point and move to advantage, then need another point to finish. Under no-ad scoring, Maya wins that next point and the game is over. One point can swing the entire game immediately.
In the usual no-ad rule, the receiver chooses which side of the court to receive the deciding serve from. In doubles, the receiving team generally chooses which player will receive it. Event rules can set out details and exceptions, so players should check the format being used—especially in mixed doubles or modified competitions.
Advantage scoring versus no-ad at a glance
| Situation | Advantage game | No-ad game |
|---|---|---|
| Score reaches 40–40 | Deuce; next point gives the winner advantage | Deciding point; next point wins the game |
| Player wins first point after deuce | Moves to advantage | Wins the game |
| Player with advantage loses the next point | Score returns to deuce | There is no advantage stage |
| Points needed to win from deuce | Two in a row by the same player | One |
What “advantage set” means—and what it doesn’t
An advantage set is a set in which a player or team must win by two games. For example, if the score reaches 6–6, play continues until someone leads by two, such as 8–6 or 10–8. In a traditional format with no set tiebreak, the set can keep going.
That is separate from the scoring used inside each game. An advantage set may use regular advantage games, but the phrase “advantage set” itself tells you about the game margin needed to win the set—not what happens at 40–40. A competition can define its own combination of game and set rules, so look at the event’s regulations if the format is unusual.
Long advantage sets have produced some of tennis’s wildest scorelines. At Wimbledon in 2010, John Isner beat Nicolas Mahut 70–68 in the fifth set. That extraordinary match showed what can happen when a deciding set has to be won by two games and there’s no tiebreak to set a limit. The match lasted 11 hours and 5 minutes across three days.
That kind of marathon is not the standard finish at today’s Grand Slams. As of October 2026, the majors use a 10-point match tiebreak at 6–6 in the deciding set: the first player or team to reach 10 points with at least a two-point lead wins. That is a tiebreak deciding the set, not a no-ad deciding point within a regular game. Those are different rules working at different stages of a match.
Where you’re likely to see no-ad scoring
Traditional advantage games remain familiar in singles, but no-ad rules are used in some formats and events to keep matches moving and make key moments even sharper. They’re common in professional doubles, including many tour events, and appear in formats such as Fast4 and some college or recreational competitions. Rules can differ by event, so don’t assume every doubles match or shortened format handles deuce the same way.
In doubles, the deciding point adds an extra layer of tactics. The receiving pair may choose the receiver they trust most for that serve, while the server and partner have to decide whether to target that player or change the pattern. One point can demand a clear plan from all four players—there’s no “we’ll see what happens on the next one” after it.
Why the rule changes the tactics
Under advantage scoring, winning the first point at deuce is valuable, but it doesn’t finish the job. The player who earns advantage still has to handle one more pressure point. That can encourage a smart server to rely on a trusted serve-and-one pattern, or a receiver to stay patient knowing a single good return only resets the contest if the opponent wins the following point.
No-ad scoring makes the first point after deuce a sudden-death moment. A server can’t settle for a safe, predictable delivery if the receiver is ready for it; a receiver may take a more aggressive position or look to attack a second serve. But overreaching can hand the server a cheap point. The best choice is often the play a competitor can execute confidently under pressure—not simply the boldest one.
For spectators, watch the score and the situation together. At deuce in an advantage game, a big serve earns advantage, not the game. At deuce in no-ad, that same serve can end the game immediately. And when the score is 40–30, remember that the leader already has a game point, regardless of whether the match uses advantage or no-ad scoring.
Frequently Asked Questions
Does the next point at deuce always decide the game?
No. In advantage scoring, the next point at deuce gives its winner advantage; that player must win the following point to take the game. In no-ad scoring, the next point at deuce is the deciding point and wins the game.
How many points do you need to win from deuce in an advantage game?
You need to win two consecutive points from deuce. If the players split those points, the score returns to deuce and the process starts again.
Is an advantage set the same as advantage scoring?
No. An advantage set must be won by two games, often continuing beyond 6–6 when there is no set tiebreak. Advantage scoring describes what happens inside a game at 40–40. A tournament’s rules determine which formats it combines.
Who chooses the side for a no-ad deciding point?
Under the usual rule, the receiver chooses the side in singles. In doubles, the receiving team generally chooses its receiver. Check the competition’s regulations for any format-specific details.
Final Thoughts
Here’s your quick courtside cheat sheet: at deuce in an advantage game, the next point earns advantage; at advantage, the next point wins the game. At deuce in a no-ad game, the next point wins the game outright. And an advantage set is about winning the set by two games, not about what happens at 40–40. Once those distinctions click, the score stops being mysterious—and every pressure point gets a lot more fun to watch.
