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A tennis tournament (also called a championship) is organized into matches between players (for singles tournaments) or teams of two players (for doubles tournaments). The matches of a tournament are grouped into rounds. In round 1, all players (or teams) are paired and play against each other in matches. The losers are said to leave, or be out. They no longer compete in the tournament (this is single elimination). The winners are again paired to play in the matches of the next round. The tournament continues until the quarterfinal round (having eight players or teams playing in pairs), then the semifinal round (having four players or teams playing in pairs), and finally the final round (having only two players or teams) are played. The winner of the final round is declared the winner of the entire tournament. A tennis match is composed of points, games, and sets. A match is won when a player or a doubles team wins the majority of prescribed sets. Traditionally, matches are either a best of three sets or best of five sets format. The best of five set format is typically only played in the Men’s singles matches at Majors and Davis Cup matches. A set consists of a number of games (a minimum of six), which in turn consist of points, with a tiebreak played if the set is tied at six games per player. Tennis scoring rests on the premise that serving is advantageous over receiving, hence it is only possible to win a set or match by breaking the opponent’s service game at least once, before a tiebreak is required. Likewise, it is not possible to win a tiebreak without winning at least one point during an opponent’s turn at serve (called a mini-break).