Nitto ATP Finals
The Nitto ATP Finals is the second highest tier of men's tennis tournament after the four Grand Slam tournaments. A week-long event, the tournament is held annually each November. The ATP Finals are the season-ending championships of the ATP World Tour and feature the top eight singles players and doubles teams of the ATP Rankings. The tournament was first held in 1970, although it was known under a different name.
Roger Federer holds the record for the most singles titles with six, while Peter Fleming and John McEnroe hold the record for the most doubles titles with seven.
The eight players who qualify for the event are split into two groups of four. During this stage, players compete in a round-robin format (meaning players play against all the other players in their group). The two players with the best results in each group progress to the semifinals, where the winners of a group face the runners-up of the other group.