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An electronic line judge is a device used in tennis to automatically detect where a ball has landed on the court. Attempts to revolutionize tennis officiating and the judging of calls in the sport began in the early 1970s and has resulted in the design, development and prototyping of several computerized, electronic line-judge devices.
The dimensions of a tennis court. The dimensions of a tennis court are defined and regulated by the International Tennis Federation (ITF) governing body and are written down in the annual 'Rules of Tennis' document. [1] The court is 78 ft (23.77 m) long. Its width is 27 ft (8.23 m) for singles matches and 36 ft (10.97 m) for doubles matches. [2]
Rebound Ace is a cushioned tennis hardcourt composed of polyurethane rubber, fiberglass, and other materials on top of an asphalt or reinforced concrete base. It is manufactured and sold by California Products Corporation 's Sports Surfaces division, a company based in Andover , Massachusetts , United States.
Plexicushion is a brand of acrylic-based hardcourt tennis surface and one of the surface types used on the professional Association of Tennis Professionals and Women's Tennis Association tours. It is manufactured and sold by the sports surfaces division of California Products Corporation, a company based in Andover, Massachusetts , United States.
The balls were traditionally white, but around the end of the 20th century "optic yellow" was introduced for improved visibility, as had been done years earlier in lawn tennis. The balls are much less bouncy than lawn tennis balls, and weigh about 2 + 1 ⁄ 2 ounces (71 grams); lawn tennis balls typically weigh 2 ounces (57 g).
All of these tournaments have been listed based on the modern definition of a tennis major, rather than when they were officially recognized by the ILTF. The Australian , French Championships , and U.S. tournaments were officially recognized by the ILTF in 1924, though the French Championships were not played in 1924 because of the Olympics.
Horses are used to measure distances in horse racing – a horse length (shortened to merely a length when the context makes it obvious) equals roughly 8 feet or 2.4 metres. Shorter distances are measured in fractions of a horse length; also common are measurements of a full or fraction of a head, a neck, or a nose. [10]
Vigoro is played on a pitch which shall be no shorter than 17.68 m [58'], [7] which is slightly shorter in length than a cricket pitch. The balls are much lighter than those for cricket, and the bat has a different shape with a long handle resembling the shape of a paddle.