Olympic tennis largely follows the same rules and regulations as used on the regular tour and at the four Grand Slam tournaments.
Yevgeny Kafelnikov won Sydney gold after a five-set thriller
A set is won by taking six games, though it must be by two clear games.
If not then a tie-breaker is played, where the first person to seven points is declared the winner of the set.
The only time the tie-breaker is not played is in the final set of a match, when one player must win by two clear games.
All matches are played as the best of three sets except the men's singles and doubles final, both of which are best of five sets.
The singles events each have 64 entrants and the doubles 32 - there is no mixed doubles tournament.
The matches are elimination rounds until the semi-finals when the two winners play off for gold and silver, while the two losers compete for the bronze.
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World rankings will be used to determine the top 48 direct entries, with a further 16 invitations allocated to the International Tennis Federation.
The court surface at the Olympic Tennis Centre in Athens will be Decoturf II, which is also used at the US Open.
In an attempt to make the tournament more attractive to leading players, ranking points will be awarded to both men and, for the first time, women.
Each nation is eligible for four entries into the men's and women's singles and can nominate a separate doubles team by direct acceptance if they are in the world's top 10.