Novak Djokovic, often referred as Nole, is a Serbian professional tennis player who is currently ranked world No. 4 in men's singles tennis by the Association of Tennis Professionals (ATP). Djokovic holds the highest match winning rate (82.7%) in the Open Era, as of July 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 (shared with Roger Federer and Nadal), and being the only player to win eight of the nine events (and at least twice). 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.