Find the Next Serving Side in a Tennis Game

You have finished a rally, called the score, and walked behind the baseline. Now comes a small uncertainty: should you serve from the right or the left? You can reconstruct the answer without remembering where the previous rally ended.

In a standard advantage game, the first point is served from the right half of the court. The server alternates halves after each completed point. Count completed points, including points lost, and the pattern becomes predictable: an even total means the next serve starts on the right; an odd total means it starts on the left.

Use the server’s viewpoint

Right and left are measured while the server faces the net. They are not fixed directions on a television screen. A camera behind the receiver shows the action from the opposite perspective, which can make a correct position look reversed.

The right half is commonly called the deuce side; the left is the ad side. The serve travels toward the diagonally opposite service box. The starting half behind the baseline and the target service box are related, but they are different places on the court.

When practicing, stand behind the baseline and face the net before deciding. Turning around to collect a ball can briefly scramble your sense of left and right. Reset your viewpoint instead of choosing the side closest to where you happen to be standing.

Walk through a game point by point

Take this imaginary sequence, with the server’s score called first. The game begins at love-all, with no points completed, so the server starts on the right. The server wins the opening rally. At 15-love, one point has been completed, and the next serve comes from the left.

The receiver wins the second point. At 15-all, the total is two points, so the server returns to the right. The server then wins the third. At 30-15, three points have been played, and the next serving position is on the left.

If the receiver wins again, the score becomes 30-all. Four completed points put the server back on the right. Notice that the identity of the point winner never changes the alternating pattern. Winning and losing both advance the game by one completed point.

For this purpose, do not add the displayed numbers as ordinary arithmetic. Thirty and fifteen are tennis scoring labels. Think of love as no points, 15 as one, 30 as two, and 40 as three during the opening progression of the game.

Deuce explains the names

At 40-all, or deuce, both players have won three points: six altogether. Six is even, so the next serve comes from the right. After one more point, someone has advantage, and the next serve comes from the left.

If the player with advantage loses the following point, the score returns to deuce. Two more points have been completed since the previous deuce, bringing the server back to the right again. The same right-at-deuce, left-at-advantage pattern continues however long the game lasts.

This gives you a quick recovery method during a long game. You do not have to reconstruct every rally since love-all. Agree on whether the score is deuce or advantage, then use the corresponding side.

A missed first serve does not move you across

A first-service fault does not complete the point. The second serve comes from the same half, assuming the first was served from the correct position. Changing sides after the fault would confuse service attempts with completed points.

A service let also does not advance the point count under the usual let rule. Replay the relevant serve from the same side. A double fault does complete a point, awarded to the receiver, so the next point starts from the other half.

A useful between-point routine is to settle the outcome, say the score clearly, and then take the serving position. If you and your opponent disagree about the score, resolve that before starting another point. Repeating a confidently stated but mistaken score makes the position problem harder to untangle.

Keep other court changes separate

Changing ends means moving to the opposite end of the whole court. That is different from alternating serving halves within a game. After an end change, right and left still come from your new position facing the net.

Alternative formats need their own check. In no-ad scoring, the deciding point at deuce normally lets the receiver choose the receiving side, with additional provisions for mixed doubles. A tie-break also has its own order of servers. Confirm the format rather than applying every advantage-game shortcut everywhere.

For an ordinary advantage game, the small routine remains dependable: establish the score, face the net, identify the correct half, and serve. With repetition, the side becomes part of keeping score instead of a separate puzzle.