Factfiles on US Open men's title contenders

Novak Djokovic admits he is "not 100%" after suffering a wrist injury on the eve of the Olympics

Factfiles on US Open men's title contenders ahead of the final Grand Slam tournament of 2016 which gets under way in New York from Monday: NOVAK DJOKOVIC (SRB) World ranking: 1 Age: 29 (22/05/1987) Career titles in total: 66 Career Grand Slam titles: 12 -- Australian Open: 2008, 2011, 2012, 2013, 2015, 2016; French Open: 2016; Wimbledon: 2011, 2014, 2015; US Open: 2011, 2015 Career prize money: $102,813,310 - Djokovic completed a career Grand Slam and the 'Novak Slam' of all four majors at the French Open in June, but then slumped to a shock third-round loss at Wimbledon. Won a record 30th Masters title in Toronto before a tearful, first-round exit preceded a withdrawal from Cincinnati to rest a wrist injury. ANDY MURRAY (GBR) World ranking: 2 Age: 29 (15/05/1987) Career titles in total: 39 Career Grand Slam titles: 3 -- Wimbledon: 2013, 2016; US Open: 2012 Career prize money: $49,880,567 - Has reached the finals of the other three majors in 2016 - losing to Djokovic in Australia and France before racing to a second Wimbledon title in July. Successfully defended his Olympic gold and put together a 22-match win streak this summer which was ended by Marin Clic in Sunday's Cincinnati final. RAFAEL NADAL (ESP) World ranking: 5 Age: 30 (03/06/1986) Career titles in total: 69 Career Grand Slam titles: 14 -- Australian Open 2009; French Open 2005, 2006, 2007, 2008, 2010, 2011, 2012, 2013, 2014; Wimbledon 2008, 2010; US Open 2010, 2013 Career prize money: $78,278,612 - Wrist injury kept Nadal off court from an early withdrawal from the French Open to the Olympics where he won gold in doubles and made semi-finals of the singles. Will go to New York as a dangerous floater should Djokovic or Murray slip up. JUAN MARTIN DEL POTRO (ARG) World ranking: 142 Age: 27 (23/09/1988) Career titles in total: 18 Career Grand Slam titles: 1 -- US Open 2009 Career prize money: $15,663,682 - His defeat of Roger Federer in the 2009 US Open final appeared to herald a new star but proved a false dawn as three wrist surgeries pushed the giant Argentine to the brink of retirement. Run to the Olympics final, where he lost a four-hour marathon to Murray, illustrated the dangers posed by one of the biggest forehands in tennis.