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.
Rafael Nadal holds the record for the most singles titles with 26 since the Masters series began in 1990,Daniel Nestor owns the most doubles titles with 25, and the Bryan Brothers have won a record 24 doubles titles as a team. No man has ever won all 9 singles titles in their career, with Novak Djokovic the record holder with 8 of the 9 titles. However in doubles, Nestor and the Bryan Brothers have each won all 9 titles throughout their careers. Novak Djokovic and Rafael Nadal hold the record for 5 titles in a year.
The series was introduced in 1990 with the inception of the ATP Tour by bringing together the nine most prestigious tournaments of the Grand Prix Tour Championship Series (1970–1989). The events were originally known as the ATP Championship Series, Single Week for the first three years. From 1993 through 1999, the series was known as the Mercedes-Benz Super 9. In 2000, the name was changed to the Tennis Masters Series and then changed to ATP Masters Series in 2004. The present name took effect in 2009.
For the 2009 season major changes took place. The ATP Masters Series was rebranded the "ATP World Tour Masters 1000", with the addition of the number 1000 referring to the number of ranking points earned by the winner of each tournament. Contrary to earlier plans, the number of tournaments has not been reduced from nine to eight and the Monte Carlo Masters will remain part of the series although, unlike the other events, it will not have a mandatory player commitment. The Hamburg Masters event was downgraded to an ATP World Tour 500 event. The Madrid Masters moved to May and onto clay courts. A new tournament in Shanghai replaced the Hamburg Masters and took over Madrid's former October indoor slot.
Six of the nine "1000" level tournaments are combined ATP and Women's Tennis Association events; more precisely, three WTA Premier Mandatory and three WTA Premier 5 tournaments, which have similar status to the ATP Masters 1000.
^ The final of the 2005 Rome Masters between Spaniard Rafael Nadal and Argentine Guillermo Coria was the longest final of the Open Era (5 hrs. and 14 mins)—in which 18-year-old Nadal prevailed, The 2006 Rome final produced another classic, 5 hrs. and 5 mins long, with Nadal defeating Federer.
^ The fifth Masters Series tournament was played in Hamburg through 2008. Beginning in 2009, the Madrid tournament switched from indoor hard courts to clay and replaced Hamburg as the fifth tournament in the schedule.
^ The eighth Masters Series tournament has had a very turbulent history. It was played in Stockholm from 1990 to 1994, Essen in 1995, Stuttgart in 1996 to 2001, and Madrid from 2002 to 2008. In 2009, Madrid moved to a new spot in the rotation, and a new tournament in Shanghai took the eighth spot.