Janko Tipsarević

Janko Tipsarević (Serbian Cyrillic: Јанко Типсаревић, Serbian pronunciation: [jâːŋkɔ tipsǎːrɛʋit͡ɕ]; born 22 June 1984) is a Serbian professional tennis player who is currently ranked inside the top 400 (No. 392, as of September 2015). His career-high singles ranking is World No. 8, achieved on 2 April 2012. In his career, he has won four ATP World Tour titles, one ATP doubles title, two Futures, and nine tournaments in the ATP Challenger Series. Tipsarević also won the 2001 Australian Open Junior title.

Tipsarević has achieved two victories over a World No. 1 player, having defeated compatriot Novak Djokovic twice. He also has thirteen victories against other players in the top 10: four wins against Tomáš Berdych, and one each against Fernando González, Mikhail Youzhny, David Ferrer, James Blake, Gaël Monfils, Andy Murray and Juan Mónaco. He holds victories over former World No. 1 players Carlos Moyá, Marat Safin, Lleyton Hewitt, Juan Carlos Ferrero and Andy Roddick. His best results at a Grand Slam have been reaching the quarterfinals at the US Open in 2011 and 2012.

Novak Djokovic

Novak Djokovic (Serbian: Novak Đoković / Новак Ђоковић, pronounced [nôʋaːk d͡ʑôːkoʋit͡ɕ]; born 22 May 1987) is a Serbian professional tennis player who is currently ranked world No. 1 in men's singles tennis by the Association of Tennis Professionals (ATP). He is generally considered one of the greatest tennis players of all time. He is coached by former Slovak tennis player Marián Vajda and former German tennis player and six-time Grand Slam champion Boris Becker.

Djokovic has won 11 Grand Slam singles titles which is ranked fourth in the open era tied with Björn Borg and has held the No. 1 spot in the ATP rankings for a total of 186 weeks. By winning three Grand Slam titles in 2011, Djokovic became the sixth male player to win three Grand Slams in a calendar year. He repeated this achievement in 2015. In Grand Slams, Djokovic has won an all-time record six Australian Open titles (tied with Roy Emerson), including an open era record of three consecutive titles from 2011–2013 (the first and only player to achieve this). He has also won three Wimbledon titles and two US Open titles.

Roger Federer

Roger Federer (German: [ˈfeːdərər] born 8 August 1981) is a Swiss professional tennis player who is currently ranked world No. 3 by the Association of Tennis Professionals (ATP). His accomplishments in professional tennis cause him to be popularly regarded as the greatest tennis player of all time. Federer turned professional in 1998 and has been continuously ranked in the top 10 since October 2002.

Federer holds several records of the Open Era: holding the world No. 1 position for 302 weeks (including 237 consecutive weeks); winning 17 Grand Slam singles titles; reaching each Grand Slam final at least five times (an all-time record); and reaching the Wimbledon final ten times. He is among the seven men (and among the four in Open Era) to capture a career Grand Slam. Federer shares an Open Era record for most titles at Wimbledon with Pete Sampras (7) and at the US Open with Jimmy Connors and Sampras (5).

Federer has reached 27 men's singles Grand Slam finals, including 10 in a row from the 2005 Wimbledon Championships to the 2007 US Open, both statistics being records. He also appeared in 18 of 19 finals from the 2005 Wimbledon through to the 2010 Australian Open. He reached the semifinals at 23 consecutive Grand Slam tournaments, from the 2004 Wimbledon Championships through the 2010 Australian Open. At the 2016 Australian Open, he played in a record 65th consecutive Grand Slam tournament, reached a record 47th Grand Slam quarterfinal and a record 39th Grand Slam semifinal. Earlier at the 2015 US Open, he reached a record 27th Grand Slam final. Also earlier at the 2013 French Open, Federer reached a record 36th consecutive Grand Slam quarterfinal. Federer has won the most matches in Grand Slams (302) and is the first to record 65+ wins at each Grand Slam tournament.