At the US Open tennis tournament, the number of sets played depends on the event:
- Men's singles matches are played in a best-of-five sets format, meaning a player must win three sets to win the match.
- Women's singles, men's doubles, and women's doubles matches are played in a best-of-three sets format, meaning a player or team must win two sets to win the match
Each set is typically won by the first player or team to reach six games with at least a two-game margin. If the score in a set reaches 6-6, a tiebreak is played to decide the set winner. In the final set, if the score reaches 6-6, an extended tiebreak (first to 10 points, win by two) is used to decide the match
