Novak Djokovic (Serbian: Новак Ђоковић, Novak Đoković pronounced ( listen); born 22 May 1987) is a Serbian professional tennis player who has been ranked number one in the world by the Association of Tennis Professionals (ATP) since 4 July 2011. He has won four Grand Slam singles titles: the 2008 and 2011 Australian Open championships, the 2011 Wimbledon Championships, and the 2011 US Open. By winning these three Majors in 2011, Djokovic became the 6th player in the open era to win 3 Majors in a calendar year. He is the first player representing Serbia to win a Major singles title and the youngest player in the open era to have reached the semifinals of all four Grand Slam events, separately and consecutively. Amongst other titles, he won the Tennis Masters Cup in 2008 and was also on the team which won the 2010 Davis Cup.
He is considered the best male tennis player to ever come out of Serbia, the former Yugoslavia and the Balkans. Djokovic is also a double winner of The Best Sportsperson of Serbia award and the award for The Best Sportsman by the Olympic Committee of Serbia. He has been awarded the Order of St. Sava, the highest decoration of the Serbian Orthodox Church. Djokovic is a UNICEF National Ambassador for Serbia.
Source : https://www.upi.com/topic/Novak_Djokovic/news/56/208