Novak Djokovic  (born May 22, 1987 in Belgrade, Yugoslavia) is an athlete Serbian professional tennis. He is currently the world's No. 1 player. He has 11 Grand Slam men's singles titles: 6 Australian Open, Wimbledon and the second 3 US Open. After winning three Grand Slam in 2011, Djokovic became the 6th player in the men's expansion era to win three Grand Slam titles in one year (he repeated this feat in 2015). In 2015, Djokovic has set a record 6 championships ATP World Tour Masters 1000, and as many bonuses for players in the history of the ATP in one season (about $ 21 million). He is the first Serbian tennis player 1 Grand Slam champion and also the youngest person in the expansion era to the semi-finals in both the GS 4, both consecutive and intermittent. He also won another major title including ATP World Tour Finals for 2008; 2012; 2013; 2014; 2015 and the National Tennis Team Serbia 2010 Davis Cup champion.