Question: what are sets in tennis?
Answer: The tennis scoring system is a way to keep track of tennis matches (including pick-up games). ... A set consists of a number of games (a minimum of six), which in turn each consist of points. A set is won by the first side to win 6 games, with a margin of at least 2 games over the other side (e.g. 6–3 or 7–5).