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Service line – line located between the net and the baseline, parallel to the net, marking the end of the service boxes. Side T – T-shape formed by the service line and the sideline. There are two such side Ts. T or Middle T – T-shape formed by the service line and the center line. Accessories often used in tennis: Athletic shoe ...
The net cord "Let" sensor was a simple piezoelectric device, initially a guitar pickup, to detect if the tennis ball touched the net during the service delivery. The service line sensors, net-cord sensor, legal serve and foot fault devices were turned "on" in unison during the process of a player serving the ball at the beginning of each point ...
It usually uses a smaller court and a lower net than standard tennis; up to three bounces may be allowed before returning the ball. [5] While sound tennis is not part of ITF , ATP , and WTA tournaments, an international tournament is held annually, and world rankings are published for male and female players with different degrees of disability.
In children's tennis, young children may be encouraged to use the underhand serve on 36 feet (11 m) courts. Although this serve is legal, it may be seen as unsportsmanlike in adult tennis. Some notable examples include Michael Chang 's in the Round of 16 at the 1989 French Open against Ivan Lendl , and Martina Hingis was booed by the crowd for ...
The net is 3 feet 6 inches (1.07 m) high at the posts and 3 feet (0.91 m) high in the centre. [67] The net posts are 3 feet (0.91 m) outside the doubles court on each side or, for a singles net, 3 feet (0.91 m) outside the singles court on each side. The modern tennis court owes its design to Major Walter Clopton Wingfield.
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Cyclops is a computer system co-invented by Bill Carlton of Great Britain and Margaret Parnis England of Malta, [1] which is used on the ATP and WTA professional tennis tours as an electronic line judge to help determine whether a serve is in or out.