Most consecutive Masters 1000 matches won

Novak Djokovic (Serbia) won 31 consecutive matches at ATP World Tour Masters 1000 events in 2011, a streak that included title-winning performances in Indian Wells, Miami, Madrid, Rome and Montreal and a run to the final in Cincinnati. The first four tournaments - Indian Wells, Miami, Madrid and Rome - formed part of a 45-match unbeaten run (including two walkovers) that also took in Serbia's victory against France in the 2010 Davis Cup final and four tournaments in 2011 - the Australian Open, Dubai Tennis Championships, Serbia Open and French Open - as Djokovic rose to No.1 in the world rankings for the first time in his career. After receiving a bye in Round 1, Djokovic's 31-match winning streak in Masters 1000 tournaments began with a second-round victory against Andrey Golubev at the BNP Paribas Open, Indian Wells, California, USA, on 13 March 2011. The Serbian won a total of six matches in Indian Wells to take the title, followed by six matches in Miami, five each in Madrid, Rome and Montreal and four in Cincinnati before being forced to retire with a shoulder injury in the final against Andy Murray while trailing 6-4, 3-0. The 31st and last match of Djokovic's winning streak, therefore, was against an injured Tomas Berdych in the Cincinnati semi-final on 20 August 2011.

During his record-breaking run, Djokovic lost just eight sets in 31 best-of-three-sets Masters 1000 matches.

Djokovic won a calendar year record-setting five Masters 1000 tournaments in 2011. Nadal matched the feat with five wins in 2013. The Masters 1000 circuit began in 2009 and was preceded by the ATP Masters Series (1990-2008) and the Grand Prix Super Series (1970-89). In the history of the format, only Rod Laver (in 1970), Jimmy Connors (in 1976) and Nadal have won five tournaments in a single season. At the time of writing (24 June 2015), Djokovic had won four of the first five Masters 1000 events of 2015 (Indian Wells, Miami, Monte Carlo and Madrid).

The first four of Djokovic's winning Masters 1000 finals in 2011 were against Rafael Nadal. In the Montreal final, he defeated Mardy Fish in three sets.

Djokovic won a total of 10 tournament titles in 2011, adding Australian Open, Wimbledon and US Open Grand Slam titles, the Dubai Tennis Championships and the Serbia Open to his five Masters 1000 events.

The nine ATP World Tour Masters 1000 tournaments are regarded as the most prestigious events on the ATP (Association of Tennis Professionals) calendar after the four Grand Slams and the year-ending ATP World Tour Finals.

Including two walkovers (Serbia Open semi-final; French Open quarter-final), Djokovic passed John McEnroe's record of 42 matches unbeaten at the start of a season when an injured Fabio Fognini pulled out of the 2011 French Open quarter-finals. In the semi-finals, Djokovic's 43-match run came to an end at the hands of Roger Federer. Note: some tennis statisticians don't class the two walkovers as wins, in which case Djokovic's 2011 winning streak ended at 41 matches (43 matches altogether including his two Davis Cup wins in 2010) - one short of McEnroe.