Tennis

Alley Width: 4.5 ft (1.37 m) per side, in play only during doubles

Doubles Court: 78 ft x 36 ft (23.77 m x 10.97 m)

Singles Court: 78 ft x 27 ft (23.77 m x 8.23 m)

Net Height Posts: 3.5 ft (1.07 m)

Net Height Center: 3 ft (0.914 m)

Service Box Depth: 21 ft (6.4 m) from the net

Length: 78ft (23.77m), Width: 27ft (8.23m), Net Height Center: 3ft, Net Height Post: 3.5ft

Play stays within the singles width; the doubles alleys on each side are out of bounds for both serves and rallies.