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Baseline: The rearmost line of the court, furthest from and parallel to the net. Center service line: The line dividing the two service boxes on each side. Center mark: The 4-inch mark at the halfway point of the baseline used to distinguish the two halves (and service boxes) of a tennis court.
Baseline – line marking the end of the court, at the back of the back court and the alleys. Center line – line dividing the two service boxes in the center of the court. Center mark – 12-inch mark at the halfway point of the baseline used to distinguish the right and left halves of a tennis court.
The original multi-colored, no-line tennis court has eleven separate colored areas with no segregating lines. As a functional, no-line tennis court design it was issued a USPTO utility patent #4,045,022 in 1977 to its inventors, Geoffrey Grant, an avid and successful senior tennis competitor, and Robert Nicks, an engineer.
Real tennis (also royal tennis or court tennis): An indoor racket sport which was the predecessor of the modern game of (lawn) tennis. The term real is used as a retronym to distinguish the ancient game from the modern game of lawn tennis. Known also as court tennis in the United States or royal tennis in Australia. [113]
Basic line marking machines for turf were available by the late 1800s. [1]: 40 They were originally developed for use on lawn tennis courts.[1]: 40 One of the first such machines, a wheel-to-wheel paint transfer device, was developed by F.H. Ayres and "would be instantly recognizable by users of many of today's machines, which work on the same principle".
Tennis is a racket sport that is played either individually against a single opponent or between two teams of two players each ().Each player uses a tennis racket strung with a cord to strike a hollow rubber ball covered with felt over or around a net and into the opponent's court.
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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.