The ATP Tour Masters 1000 tournaments (previously known as the ATP World Tour Masters 1000 tournaments, ATP Masters Series, Tennis Masters Series, ATP Super 9, and ATP Championship Series, Single-Week) are the third highest tier of annual men's tennis tournament after the four Grand Slam tournaments and the ATP Finals.
Results in ATP Tour 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 Finals. Up until 2007, most Masters Series finals were contested as best of five-set matches. Currently, all Masters Series matches (including the finals) are decided in best of three-set matches.
In singles, Rafael Nadal holds the record for the most titles with 35 since the Masters Series began in 1990. Novak Djokovic is the only player to have won all nine Masters 1000 singles titles and became the first player to complete the Career Golden Masters in 2018. Roger Federer, Andre Agassi, Andy Murray, and Nadal have each won 7 different titles.
In doubles, the Bryan brothers (Bob and Mike) have won a record 39 doubles titles, all as a team. Daniel Nestor and the Bryan brothers have each won all 9 titles throughout their careers. The Bryans have won 6 titles in a single year once (2014) and 5 titles in a single year twice (2007 and 2013).
Currently, the following 9 tournaments are part of the ATP Tour Masters 1000: Canadian Open (alternating yearly between Montreal and Toronto), Italian Open (held in Rome), Indian Wells Masters, Miami Open, Monte Carlo Masters, Madrid Open, Cincinnati Masters, Shanghai Masters and Paris Masters. Since 2009, 5 of the tournaments are held on outdoor hard courts, 3 on clay and 1 on indoor hard court whereas from 1987 until 2008 there were two indoor tournaments at the top nine level.
In 2009, the Shanghai Masters replaced the Madrid Open, until then held as an indoor event, in the eighth slot of the year with the Madrid Open switched to clay courts replacing the Hamburg Open in the spring clay court season. The Shanghai Masters was designated as an outdoor event despite the facility having a retractable roof and having been used as the indoor venue for the ATP Finals (then called the Tennis Masters Cup) from 2005 until 2008. From 1970 until 1986 there had usually been 3 indoor events among the top nine tournaments (then called the Grand Prix Championship Series), with there being four indoor events plus the year-end Championships indoors from 1978 to 1980.
There are no grass court Masters 1000s, and there have not been any since the Sydney Open in 1970 and 1971 despite the fact that as recently as 1987 two of the four Grand Slam tournaments (the Australian Open and Wimbledon) were played on grass and until 1974 the U.S. Open was also played on grass.
1990–1995 ATP Championship Series, Single-Week
1996–1999 ATP Super 9
2000–2003 Tennis Masters Series
2004–2008 ATP Masters Series
2009–2018 ATP World Tour Masters 1000
2019–present ATP Tour Masters 1000
- Players with byes receive first round points.
Active players and most titles in each column in bold.
^ Active players in bold.
Since the start of 2009, the Big Four (Roger Federer, Rafael Nadal, Novak Djokovic, and Andy Murray) have combined to win 78 of the last 97 ATP Tour Masters 1000 finals (through to 2019 Cincinnati Masters), and had a streak of 42 consecutive finals appearances (from 2013 Indian Wells to 2017 Canada). Djokovic won 29 titles, Nadal won 23 titles, Federer won 14, and Murray 12 titles.
The remaining 19 titles were won by 17 different players, with only Alexander Zverev winning three times. Only 5 players outside the Big 4 have reached more than 3 Masters 1000 finals through to 2019 Cincinnati Masters. David Ferrer made it to 7 finals and won a title at 2012 Paris. Zverev made it to 5 finals and won 3 titles (2017 Rome, 2017 Canada, and 2018 Madrid). John Isner also made it to 5 finals and won the 2018 Miami Open title. Juan Martín del Potro reached 4 finals and won the 2018 Indian Wells title. Kei Nishikori made it to 4 finals but won none.
The Big Four won 18 consecutive titles from the 2014 Cincinnati to the 2016 Canada event. Nadal and Djokovic together held all 9 Masters 1000 singles titles starting with the 2013 Monte Carlo tournament through the 2014 Miami event.
Djokovic holds the record for the most Masters 1000 singles titles in a year, winning 6 in 2015, while Djokovic and Nadal share the second most titles in a year with 5 (Djokovic in 2011, and Nadal in 2013). Additionally, Djokovic and Nadal are the only two players to win four singles titles in a row, and Nadal is the only person to complete the feat in the same calendar year when he won Madrid, Rome, Canada, and Cincinnati in 2013.
Djokovic is the first and only male player to have won all nine of the Masters 1000 tournaments, after he won 2018 Cincinnati.
Only 9 times has a player outside of the Big Four won a title by beating a member of the Big Four since 2009:
- Nikolay Davydenko defeated Nadal
- Stan Wawrinka, Jo-Wilfried Tsonga, Juan Martin del Potro, and Dominic Thiem defeated Federer
- Marin Čilić defeated Murray
- Alexander Zverev defeated Djokovic and Federer
- Karen Khachanov defeated Djokovic