Novak Djokovic, born 22 May 1987, is a Serbian professional tennis player who is currently ranked world No.1 in men's singles tennis by the Association of Tennis Professionals (ATP). He is considered one of the greatest tennis players of all time. He is coached by former Slovak tennis player Marián Vajda and former German tennis player and six-time Grand Slam champion Boris Becker.

Major Achievements:

-Novak has won 12 Grand Slam (major) titles, the fourth most in in the Open Era. Djokovic is one of eight players to achieve the Career Grand Slam and he's the only one in tennis history to hold all four Grand Slams on three different surfaces at once

-He has the record of most titles won in ATP Masters 1000 with 30 titles and he's won 5 World Tour Finals titles, four of which were won consecutively from 2012 to 2015 (Open Era record)

-Djokovic's 2011 season is considered as one of the greatest seasons by a tennis player in the Open Era. Djokovic won 10 titles on 3 different surfaces and defeated both of Rafael Nadal and Roger Federer ten times, going 10–1 against them

-Novak also made the finals of all big tournaments he played in 2015 and set a new all-time rankings record. Djokovic's 2015 is seen as the greatest season in the Open Era by many fans