Strings (tennis)
The material used in tennis string can significantly affect a player's performance, and even health. Several materials are used to make tennis strings. They vary in terms of elasticity, durability, rebound efficiency, tension holding capability, and manufacturing cost, among other considerations.
Tie (draw)
In most professional tennis matches, a tiebreaker rule applies in each set to avoid lengthy matches, as happens quite frequently if the traditional tennis rule for winning a set is followed. When players reach a score of 6–6 in a set, instead of continuing the set until one opponent wins with a two-game difference, a special game is played to decide the winner of the set; the winner is the first to reach at least seven points with a difference of two over the opponent. This however does not apply to the final set of matches at the French Open, allowing the total number of games in a match to be virtually unlimited (for example, the final set of the Isner–Mahut match at the 2010 Wimbledon Championships ended only when John Isner beat Nicolas Mahut 70–68). The Australian Open and Wimbledon Championships did not use a final set tiebreaker through the 2018 tournaments, but will begin to use a tiebreaker in 2019 (For Wimbledon, the final set tiebreaker will only occur once the score of the final set reaches 12–12).