<P> The ATP World Tour Masters 1000 (previously known as the ATP Championship Series, Single - Week, ATP Mercedes - Benz Super 9, Tennis Masters Series, and ATP Masters Series) is the third highest tier of annual men's tennis tournament after the four Grand Slam tournaments and the ATP World Tour Finals . </P> <P> 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 matches (including the finals) are decided in best of three - set matches . </P> <P> Rafael Nadal and Novak Djokovic hold the record for the most singles titles with 30 since the Masters series began in 1990 . Nadal and Djokovic held all 9 Masters 1000 crowns starting with the 2013 Monte Carlo title through the 2014 Miami title, which was the first time that 2 players possessed all nine of the titles . The Bryan Brothers have won a record 36 doubles titles, all as a team . No player has ever won all 9 singles titles in his career, with Novak Djokovic winning 8, and Andre Agassi, Roger Federer, Rafael Nadal and Andy Murray each winning 7 . However, in doubles, Daniel Nestor and the Bryan Brothers (Bob and Mike) have each won all 9 titles throughout their careers . Djokovic holds the record for 6 singles titles in a year (2015). In doubles, the Bryans have won 6 titles in a single year once (2014) and 5 titles in a single year twice (2007 and 2013). </P> <Table> <Tr> <Th> Tournament </Th> <Th> Country </Th> <Th> Location </Th> <Th> Current Venue </Th> <Th> 2017 Event Calendar </Th> <Th> Began </Th> <Th> Court surface </Th> <Th> Central court capacity </Th> <Th> Draw </Th> <Th> Defending champion </Th> <Th> Prize </Th> </Tr> <Tr> <Td> Indian Wells Masters </Td> <Td> United States </Td> <Td> Indian Wells, California </Td> <Td> Indian Wells Tennis Garden </Td> <Td> March 9--19 </Td> <Td> </Td> <Td> Hard </Td> <Td> 16,100 </Td> <Td> 96 </Td> <Td> Roger Federer </Td> <Td> $8,092,625 </Td> </Tr> <Tr> <Td> Miami Open </Td> <Td> United States </Td> <Td> Key Biscayne, Florida (Miami) </Td> <Td> Tennis Center at Crandon Park </Td> <Td> March 23--April 2 </Td> <Td> 1985 </Td> <Td> Hard </Td> <Td> 13,300 </Td> <Td> 96 </Td> <Td> Roger Federer </Td> <Td> $6,993,450 </Td> </Tr> <Tr> <Td> Monte - Carlo Masters </Td> <Td> Monaco </Td> <Td> Roquebrune - Cap - Martin, France </Td> <Td> Monte Carlo Country Club </Td> <Td> April 16--23 </Td> <Td> 1897 </Td> <Td> Clay </Td> <Td> 10,000 </Td> <Td> 56 </Td> <Td> Rafael Nadal </Td> <Td> € 4,273,775 </Td> </Tr> <Tr> <Td> Madrid Open </Td> <Td> Spain </Td> <Td> Madrid </Td> <Td> Caja Mágica </Td> <Td> May 7--14 </Td> <Td> 2002 </Td> <Td> Clay </Td> <Td> 12,500 </Td> <Td> 56 </Td> <Td> Rafael Nadal </Td> <Td> € 5,439,350 </Td> </Tr> <Tr> <Td> Italian Open </Td> <Td> Italy </Td> <Td> Rome </Td> <Td> Foro Italico </Td> <Td> May 14--21 </Td> <Td> 1930 </Td> <Td> Clay </Td> <Td> 10,400 </Td> <Td> 56 </Td> <Td> Alexander Zverev </Td> <Td> € 4,273,775 </Td> </Tr> <Tr> <Td> Canadian Open </Td> <Td> Canada </Td> <Td> Montreal / Toronto </Td> <Td> Stade Uniprix / Aviva Centre </Td> <Td> August 7--13 </Td> <Td> 1881 </Td> <Td> Hard </Td> <Td> 11,700 / 12,500 </Td> <Td> 56 </Td> <Td> Alexander Zverev </Td> <Td> $4,662,300 </Td> </Tr> <Tr> <Td> Cincinnati Masters </Td> <Td> United States </Td> <Td> Mason, Ohio (Cincinnati) </Td> <Td> Lindner Family Tennis Center </Td> <Td> August 13--20 </Td> <Td> 1899 </Td> <Td> Hard </Td> <Td> 11,600 </Td> <Td> 56 </Td> <Td> Grigor Dimitrov </Td> <Td> $4,973,120 </Td> </Tr> <Tr> <Td> Shanghai Masters </Td> <Td> China </Td> <Td> Shanghai </Td> <Td> Qi Zhong Stadium </Td> <Td> October 8--15 </Td> <Td> 2009 </Td> <Td> Hard </Td> <Td> 15,000 </Td> <Td> 56 </Td> <Td> Roger Federer </Td> <Td> $8,092,625 </Td> </Tr> <Tr> <Td> Paris Masters </Td> <Td> France </Td> <Td> Paris </Td> <Td> AccorHotels Arena </Td> <Td> October 30--November 5 </Td> <Td> 1968 </Td> <Td> Hard (i) </Td> <Td> 14,000 </Td> <Td> 48 </Td> <Td> Jack Sock </Td> <Td> € 4,273,775 </Td> </Tr> </Table>

Who has won the most atp masters 1000 titles