Novak Djokovic (b. 1987) is a Serbian professional tennis player, the only male player to have won all nine of the Masters' tournaments, and has done so twice. Djokovic has been ranked No. 1 for a record total of 373 weeks and has finished as the year-end No. 1 a record seven times. Djokovic has six ATP Finals titles and a record 38 ATP Masters titles. He has won 21 Grand Slam men's singles titles, including a record nine Australian Open titles. (2022)