At 40–40, a tennis game reaches deuce. The next point does not win the game outright: it gives one player the advantage. That small change in the score can put a server one point from holding serve—or give a returner a chance to break.
Here’s what an advantage point means, how to read “Ad-in” and “Ad-out,” and what happens if the player with the advantage loses the next rally.
What Does an Advantage Point Mean in Tennis?
An advantage point is a point played after deuce that gives one player the lead in a game. If that player wins the next point, they win the game. If they lose it, the score returns to deuce.
In standard tennis scoring, a player must win by two points. So, from 40–40, one point earns the advantage, and a second straight point is needed to finish the game. The advantage is not the same as a game point: it becomes a game-winning opportunity only after the player has earned it.
How Advantage Scoring Works
A typical game moves through love, 15, 30, and 40. When both players reach 40, the score is deuce. From there, the game can go back and forth between deuce and advantage until someone wins two points in a row.
| What happens | Score called | What the next point means |
|---|---|---|
| Both players have at least three points and are tied | Deuce | The winner earns the advantage |
| The server wins the point at deuce | Advantage server, or “Ad-in” | If the server wins again, they win the game |
| The receiver wins the point at deuce | Advantage receiver, or “Ad-out” | If the receiver wins again, they win the game |
| The player with the advantage loses the next point | Deuce | The game continues with neither player ahead |
Ad-in and Ad-out
Ad-in means the server has the advantage; Ad-out means the receiver has it. These calls are common ways to describe the score, especially during commentary. An umpire will usually announce “Advantage” followed by the player’s name.
For example, if the score is deuce and the server wins the rally, the score is advantage server. If the server takes the next point too, the game is over. But if the receiver wins that next point, the score goes back to deuce—not to 40–40 in most spoken score calls, even though deuce is the same score situation.
A Simple Advantage Point Example
Suppose Maya is serving against Elena at 40–40. Maya wins the next rally, so the score is advantage Maya, or Ad-in. She is now one point from winning the game. Elena then returns Maya’s serve and wins the rally. The score goes back to deuce.
Now Elena wins the next point. She has Ad-out and is one point from breaking Maya’s serve. If Maya wins the following rally, however, it returns to deuce again. The process repeats until one player wins two consecutive points from a deuce position.
Why Advantage Points Matter Tactically
An advantage point can change the pressure in a game, but it does not guarantee the player will win it. A server with Ad-in may look to use a reliable first serve, then attack a short return. A receiver with Ad-out might aim for a deep return to make the server hit an extra shot. The best choice depends on the players and the situation.
For the player who has the advantage, the key is usually to play the point with a clear plan rather than rush for a winner. For the player facing the advantage point, staying patient matters: win the rally and the score is back to deuce. In a long game, that ability to reset can be just as important as hitting a big shot.
Advantage points also matter in close matches because they can decide whether a player holds serve or gets broken. Winning an Ad-out point can create a break point; winning an Ad-in point can save one and keep the service game alive.
Does Every Tennis Match Use Advantage Scoring?
No. Many matches use standard advantage scoring, but some leagues and tournaments use no-ad scoring to make matches shorter. In that format, when the score reaches deuce, the next point decides the game. There is no Ad-in, Ad-out, or return to deuce after that deciding point.
Check the event’s rules if you are unsure which format is being used. Also, an advantage point is different from a point in a tiebreak. Tiebreaks use their own numerical scoring system, and players generally need to win by two points there as well.
Frequently Asked Questions
Is an advantage point the same as a game point?
Not quite. An advantage point gives a player the lead after deuce. If that player wins the next point, then they win the game. So the point played at advantage is a chance to close out the game, but the advantage itself is not a guaranteed game win.
What happens if a player loses an advantage point?
The score returns to deuce. Neither player has the advantage, and the next point will give the winner a new advantage.
What does Ad-in mean in tennis?
Ad-in means the server has the advantage after deuce. If the server wins the next point, they win the game. If the receiver wins it, the score goes back to deuce.
Can a tennis game have more than one advantage point?
Yes. If players keep trading points after deuce, the game can return to deuce several times. It ends only when one player wins two points in a row from a deuce score under standard advantage scoring.
Final Thoughts
A tennis advantage point is the point that gives one player the lead after deuce. Win the next point as well, and you win the game; lose it, and the score resets to deuce. Remembering that simple pattern makes score calls like Ad-in and Ad-out much easier to follow—and helps explain why a game can keep going long after it reaches 40–40.
