The ATP World Tour Masters 1000 (previously known as the ATP Championship Series, Single-Week , ATP Super 9 , Tennis Masters Series , and ATP Masters Series) is the third highest tier of men's tennis tournament after the four Grand Slam tournaments and ATP World Tour Finals.
Results in ATP Masters 1000 events earn players more world ranking points than regular tournaments, though not as many as Grand Slam events or the year-end ATP World Tour Finals. Up until 2007, most Masters Series finals were contested as best of five-set matches. Currently, all Masters Series events are decided in best of three-set matches.
Novak Djokovic holds the record for the most singles titles with 30 while Bryan Brothers won a record 36 doubles titles, all as a team.
No man has ever won all 9 singles titles in his career, with Novak Djokovic winning 8, Andre Agassi, Roger Federer and Andy Murray each winning 7, and Rafael Nadal winning 6. However, in doubles, Daniel Nestor and the Bryan Brothers (Bob and Mike) have each won all 9 titles throughout their careers.