Novak Djokovic, a winner of three Grand Slam tournaments in 2015, remains the number one rated player in the ATP ranking of men's professional tennis. The Serbian is followed in the rankings by Andy Murray of Great Britain.
Roger Federer and fellow Swiss player Stanislas Wawrinka are the next two in the rankings. Rounding out the top five is Rafael Nadal, a winner of 14 major titles who has been battling a series of injuries. The top 10 also finds Tomas Berdych, David Ferrer, Kei Nishikori, Richard Gasquet and Jo-Wilfried Tsonga. The highest rated American is John Isner, who holds the 11th position.