10.97 vs 8.23 m
Doubles tennis uses a wider court than singles
6 min readLast updated
Photo: Adrian Pingstone (Arpingstone) · Public domain
The short answer
The standard doubles court is 10.97 metres wide, compared with 8.23 metres for singles. Both formats use the same 23.77 metre length.
Why it's true
The extra strips beside a singles court are not decorative margins. They are part of the doubles playing area during rallies. ITF Rule 1 specifies a width of 36 feet for doubles and 27 feet for singles, expressed in the rulebook as 10.97 and 8.23 metres respectively.
Using the published metric figures, doubles adds 2.74 metres across the court, split between its two sides. These strips are commonly called doubles alleys or tramlines. They change the landing area for rally shots, but they do not enlarge the service boxes. That exception is crucial for understanding why a wide doubles serve can still be a fault.
By the numbers
10.97 m
Doubles court width
8.23 m
Singles court width
2.74 m
Additional width using published figures
How we know
The authoritative evidence is the opening court specification in the ITF Rules of Tennis. Its plan shows both sets of sidelines on a single rectangle. The outside sidelines define doubles; the inside pair defines singles. The service courts remain between the singles sidelines, the net, and the service lines, with a centre service line separating left from right.
The difference is especially easy to see when a court is prepared for both formats. Four long sidelines appear, but players do not select whichever one suits a particular shot. The format determines the relevant rally boundary, while the service rules determine the smaller target required to start the point.
Worth remembering
- Doubles adds width, not length.
- Each alley is approximately 1.37 metres wide.
- Doubles service boxes do not include the alleys.
In context
Measured from the published metric dimensions, the singles rectangle covers about 195.6 square metres and the doubles rectangle about 260.8. These are calculated playing areas, not facility construction footprints. Fencing, access, and safe movement space require additional room outside the marked court.
A closer look
Why the alleys matter
Adding width creates new angles for passing shots and wider targets for returns once a serve has been put into play. A ball can land in an alley and win a doubles rally even though the identical bounce would be out in singles. Players therefore defend a different rectangle rather than merely sharing the work of covering a singles court.
Two partners must decide who protects the middle and who covers each outside lane. Their coverage is a tactical arrangement, not a set of individually assigned legal territories. Either partner can normally hit a rally ball. The wider boundary rewards coordinated movement because a team that follows the ball poorly can leave open both a sideline and the space between its players.
The serve does not gain extra width
For service, the first bounce must land in the diagonally opposite service court. The alley lies outside that box. A server cannot use the doubles sideline as the outer service target simply because four people are on court. After a valid serve is returned, however, the doubles boundary applies to subsequent rally landings.
The server may choose a wider starting position in doubles, within the applicable baseline and sideline extensions. Starting position and landing target are separate concepts. A wider stance can change the angle through the service box without changing the box itself. This is why doubles service tactics can look very wide even though the valid first-bounce area has not expanded.
The wider court also changes how viewers should interpret an apparently missed shot. A return landing outside the singles sideline but inside the doubles boundary has reached a legal rally target in doubles. The same location remains outside the service box if it is the first bounce of a serve. Identify the phase of the point before judging the boundary. This simple sequence, first establish the format and then establish whether the ball is a serve or a rally shot, resolves many apparent contradictions in the markings without inventing any extra exceptions.
Related facts
Compare another rule that fixes the size of a playing surface. A regulation tennis court is 23.77 metres long.
Explore another measurable constraint on a ball crossing a net. A tennis net is lower at the centre than at its supports.
Compare a rule about who may participate at the same time. Indoor volleyball has six players per team in play.
See how location changes the value of a successful shot. A successful FIBA three-point field goal is worth three points.
Key terms
- Doubles court
- The tennis court width of 10.97 metres used for doubles play.
- Singles court
- The 8.23-metre-wide playing area used for singles, within the wider doubles court.
People also ask
How wide is each alley?
Half the difference between the published widths is approximately 1.37 metres. The imperial court dimensions describe an additional nine feet overall, or four and a half feet on each side. Small differences in decimal conversions reflect rounding in the published metric equivalents.
Is a serve into the alley good in doubles?
No, not if its first bounce is outside the service court. The doubles alley is available during a rally, but it is not part of the service box. A service that clips the relevant service-box boundary line can be good because the line belongs to the area it defines.
Does the doubles court have more length?
No. The baselines remain 23.77 metres apart. The format changes width, player partnership, and service and receiving arrangements, but not the basic end-to-end dimension. Thinking of doubles as simply a larger version in every direction is misleading.
Can a singles match use a court marked for doubles?
Yes. Players use the inside sidelines for the singles landing area. Where a doubles net is used, the ITF specifies singles sticks to support it appropriately for singles. The painted outer rectangle can remain visible without becoming part of the singles court.
Are the sidelines themselves in?
A ball touching the relevant boundary line counts as touching the court bounded by it. The important word is relevant: touching the doubles sideline cannot rescue a singles shot, because that line is outside the singles landing area. The format has to be settled before interpreting the bounce.
