Roger Federer (German pronunciation: [ˈrɔdʒər ˈfeːdərər]; born 8 August 1981) is a Swiss professional tennis player. He is ranked No. 5 in the world by the Association of Tennis Professionals (ATP). He has won 20 Grand Slam men's singles titles, an all-time record shared with Rafael Nadal. Federer has been No. 1 in the ATP rankings a record total of 310 weeks – including a record 237 consecutive weeks – and has finished as the year-end No. 1 five times. Federer has won 103 ATP singles titles, the second-most all-time behind Jimmy Connors and including a record six ATP Finals.
Federer has played in an era where he dominated men's tennis together with Nadal, Novak Djokovic, and Andy Murray, who have been collectively referred to as the Big Four. A Wimbledon junior champion in 1998, Federer won his first Grand Slam singles title at Wimbledon in 2003 at age 21. In 2004, he established himself as the best player in men's tennis by winning three out of four major singles titles and the ATP Finals, a feat he repeated in both 2006 and 2007. Over a stretch from 2005 to 2010, Federer made 18 out of 19 major singles finals. During this span, he won his fifth consecutive titles at both Wimbledon and the US Open. He completed the career Grand Slam at the 2009 French Open after three previous runner-ups to Nadal, his only main rival up until 2010. At age 27, he also surpassed Pete Sampras's then-record of 14 Grand Slam men's singles titles at Wimbledon in 2009.
Novak Djokovic (Serbian: Новак Ђоковић, romanized: Novak Đoković, pronounced [nôʋaːk dʑôːkoʋitɕ] (listen); born 22 May 1987) is a Serbian professional tennis player. He is ranked world No. 1 by the Association of Tennis Professionals (ATP), has held the top ranking for 294 weeks, and has finished as the year-end No. 1 a joint-record six times. Djokovic has won 17 Grand Slam men's singles titles, the third-most in history behind only Roger Federer and Rafael Nadal. He is the only player to complete the career Golden Masters – that is, winning all nine modern ATP Masters 1000 tournaments, which he has done twice. Overall, he has won 81 ATP singles titles, including a record eight Australian Open titles and a record 36 Masters events.
Two of the main strengths of Djokovic's playing style are his powerful and consistent two-handed backhand and his ability to turn defense into offense. He excels at returning serve in particular, and regularly ranks among the tour leaders in return points, return games, and break points won. He has also led the ATP Tour in their career Under Pressure Rating statistic since 1991, in part because of his prowess at winning deciding sets. Djokovic has won the Laureus World Sportsman of the Year award four times. He is also a recipient of the Order of St. Sava, the Order of Karađorđe's Star, and the Order of the Republika Srpska.