Another, however informal, tennis format is called Canadian doubles. This involves three players, with one person playing a doubles team. The single player gets to utilize the alleys normally reserved only for a doubles team. Conversely, the doubles team does not use the alleys when executing a shot. The scoring is the same as a regular game. This format is not sanctioned by any official body.

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Mark Beede is a USPTA, PTR, and ATPCA certified tennis coach, manager, and educator. Born and raised in Maine, USA, Beede received his undergraduate degree from Brandeis University and law degree from the University Of Maine School Of Law. After practicing law for sixteen years, Mark changed careers to tennis and moved to Hawaii to work with the USTA–Hawaii Pacific section and the Hawaii Pacific Tennis Foundation. Beede then moved to Istanbul, Turkey, to work as director of coaching education and special projects with Gavin Hopper at his international academy of professional players and elite juniors. Beede has a grown daughter and ... View Profile

The rules of modern tennis have changed little since the 1890s. Two exceptions are that from 1908 to 1961 the server had to keep one foot on the ground at all times, and the adoption of the tiebreak in the 1970s. A recent addition to professional tennis has been the adoption of electronic review technology coupled with a point-challenge system, which allows a player to contest the line call of a point, a system known as Hawk-Eye.
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