Claim: Novak Djokovic broke the single-season tennis record.

Novak Djokovic -LRB- Новак Ђоковић , Novak Đoković , -LSB- nôʋaːk d͡ʑôːkoʋit͡ɕ -RSB- ; born 22 May 1987 -RRB- , often referred to by the hypocorism Nole , is a Serbian professional tennis player who is currently ranked world No. 2 in men 's singles tennis by the Association of Tennis Professionals -LRB- ATP -RRB- . He is considered one of the greatest tennis players of all time . Djokovic holds the highest match winning rate -LRB- 82.8 % -RRB- in the Open Era , as of May 2017 .   Djokovic has won 12 Grand Slam singles titles , the fourth most in history , and held the No. 1 spot in the ATP rankings for a total of 223 weeks . In majors , Djokovic has won six Australian Open titles , three Wimbledon titles , two US Open titles and one French Open title . In 2016 , he became the eighth player in history to achieve the Career Grand Slam ; by winning the 2016 French Open , Djokovic became the third man to hold all four major titles at once , the first since Rod Laver in 1969 , and the first ever to do so on three different surfaces .   Djokovic has won an all-time record of 30 Masters 1000 series titles , tied with Rafael Nadal . Djokovic 's records include breaking the single-season record with six masters titles in 2015 , winning 31 consecutive ATP World Tour Masters 1000 series matches , playing in the finals at all nine ATP Masters 1000 tournaments -LRB- shared with Roger Federer and Nadal , and being the only player to win eight of the nine events -LRB- and at least twice -RRB- . Among other titles , he has won the ATP World Tour Finals five times and was on the Serbian team which won the 2010 Davis Cup . He also won the Bronze medal in men 's singles at the 2008 Summer Olympics .   Djokovic is the first Serbian player to be ranked No. 1 by the ATP and the first male player representing Serbia to win a Grand Slam singles title . Djokovic has won numerous awards , including the 2012 , 2015 , and 2016 Laureus World Sports Award for Sportsman of the Year , 2011 BBC Overseas Sports Personality of the Year , five-time ITF World Champion , and four-time ATP year-end number 1 . He is a recipient of the Order of St. Sava , the Order of Karađorđe 's Star and the Order of the Republika Srpska .