Tennis doubles rules: what changes from singles

Tennis doubles rules match singles almost everywhere. The three real differences: the doubles alleys are live on every shot except the serve, all four players serve in a fixed rotation, and each pair locks its receiving order for a whole set.

Tennis doubles rules that carry over from singles

Scoring is untouched — 15, 30, 40, deuce, advantage, six games with a two-game margin, a tiebreak at 6–6 in a tie-break set. The tennis scoring rules carry over, along with lets, foot faults, the two-serve allowance, and changing ends after every odd game.

Tennis singles vs doubles court: the alleys are live

The court is 78 feet (23.77 m) long in both formats. Width is the difference — 27 feet (8.23 m) for singles, 36 feet (10.97 m) for doubles. That extra nine feet is two alleys, or tramlines, of 4 feet 6 inches (1.37 m) each.

The servicelines are drawn between the singles sidelines, so the service courts are identical in both formats: 21 feet (6.40 m) deep, 13 feet 6 inches (4.115 m) wide. A serve into the alley is a fault; from the return on, the alleys are live.

Measurement	Singles	Doubles
Court width	27 ft / 8.23 m	36 ft / 10.97 m
Court length	78 ft / 23.77 m	78 ft / 23.77 m
Alleys in play	No	Yes, after the serve
Service court	21 ft × 13 ft 6 in	Identical
Server's stance	Center mark to singles sideline	Center mark to doubles sideline

The rest of the tennis court dimensions are shared. A doubles server may also stand out past the singles sideline, which opens serve angles singles players never get.

Tennis doubles serve rules: the four-player rotation

The team serving first decides which partner serves game one. Their opponents then decide which partner serves game two. Game three goes to the partner of the game-one server, game four to the partner of the game-two server. That rotation runs to the end of the set, so each player serves once every four games.

The order resets between sets, and a team can nominate either partner to open, which reshuffles the whole rotation. If the set reaches a tiebreak, the rotation carries on from where it stopped: whoever is next in line serves the first point from the right half, then the serve passes down the same order in two-point blocks, with ends changed every six points.

Delivery follows the standard tennis serve rules, with two doubles-only wrinkles. A serve that hits the server's own partner is a fault. A serve that touches the receiver's partner before it bounces wins the point for the serving team — unless it clipped the net on the way, which makes it a let.

Keeping four names in order across a long changeover is the part pairs actually forget. Tennis Scoreboard is a tennis scoreboard app for iPhone and Apple Watch that tracks match scores, and its doubles mode holds the four-player rotation and each pair's receiving order so you're not rebuilding them from memory.

Order of receiving: locked for the whole set

The tennis doubles serving rules get most of the attention, but the receiving order is the one people break. Before its first receiving game in a set, a pair decides which partner takes the first point of that game — in practice, who stands in the deuce court. That player receives every deuce-court point for the rest of the set; the partner takes every ad-court point.

You cannot swap sides mid-set, even between games. If the ad-court returner is getting picked apart, you live with it until the set ends. In a set tiebreak the lock holds: each player keeps the half they have been receiving in all set, even though the serve alternates halves every point. A 10-point match tiebreak played in place of a deciding set is the exception — it opens like a fresh set, so a team may rearrange both its serving and its receiving order.

Only the nominated receiver may play the serve; once the return is struck, either partner can hit the ball from anywhere. No-ad scoring bends this at the deciding point: the receiving team picks which half the serve comes to, but the two players may not swap positions to take it.

Serving or receiving out of turn

Points already played always stand; nothing is replayed.

If a player serves out of turn in a standard game, the player who was due to serve takes over the moment the error is spotted. If the game finishes first, the altered order holds for the rest of the set. What happens to a fault already served depends on who erred: if the wrong team served, that fault is wiped; if the correct team's wrong partner served — the doubles case — it stands. In a tiebreak, an out-of-turn serve caught after an even number of points is corrected immediately; after an odd number, the altered order stays.

If a pair receives out of turn, the switched order stays until the end of that game; the next time that pair receives in the set, they resume their original order. A player serving from the wrong half is corrected as soon as it is noticed, with the score deciding the right half; a fault served before that stands.

Doubles positioning and formations

One rule makes the interesting formations legal: the server's partner and the receiver's partner may take any position on their own side of the net, inside or outside the court. Only the server, pinned behind the baseline between the center mark and the sideline, is restricted.

One up, one back

The default. The server's partner stands at the net in the other half, hunting a weak return. The receiving side puts the returner at the baseline and the partner near the service line, ready to move forward once the return lands deep.

Both back

Both players on the baseline, used against a big server, a team that lobs constantly, or slow clay where net position matters less. It concedes the net, so it is a holding pattern rather than a plan.

Australian and I formation

In the Australian formation, the server's partner lines up at the net on the same half as the server, in the lane a crosscourt return would travel down. That leaves the down-the-line side empty, and the server crosses to cover it after delivery. The I formation goes further: the partner crouches astride the center serviceline and breaks left or right on a pre-agreed signal, so the returner cannot read the split until the ball is gone. Both punish a returner who has grooved one crosscourt reply — the core of most doubles strategy in tennis at club level.

Tennis doubles positioning is otherwise about moving as a unit. When one player is pulled wide, the partner shifts the same direction instead of guarding a fixed lane.

Common scoring variants in doubles

ATP and WTA tour doubles use no-ad scoring — the first point after deuce decides the game — and replace the deciding set with a 10-point match tiebreak. Many leagues and college formats copy one or both. In mixed doubles the deciding point is received by the player of the same gender as the server. Grand Slam doubles formats vary by event, so confirm yours before the toss.

FAQ

Are the doubles alleys in play on the serve?

No. The serve must land in the diagonal service court, which is the same size in both formats, so a serve into the alley is a fault. From the return onward, the alleys are live for both teams.

Can you change the receiving order in the middle of a set?

No. Each pair fixes its deuce-court and ad-court returner before its first receiving game and keeps it through the set, set tiebreak included. Under no-ad scoring the receiving team picks which half the deciding point is served to, but the players still cannot swap positions.

What happens if someone serves out of turn in doubles?

All points played stand. The correct server takes over immediately if the game is still running; if the game finished first, the new order holds for the rest of the set. A fault served by the wrong partner of the correct team before the error was spotted still counts.

Who serves first in a doubles tiebreak?

The player whose turn it was in the set rotation. That player serves one point from the right half, then the serve moves through the same four-player order in two-point blocks, with ends changed every six points.