Novak Djokovic
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Novak Djokovic poses with the trophy after defeating Andy Murray in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Feb. 1, 2015.
Credit: Newsday / J. Conrad Williams, Jr.
Novak Djokovic stretches while hitting hitting a forehand against Stanislas Wawrinka during the first set in the men's semifinals at the 2013 U.S. Open Tennis Championships at the USTA Billie Jean King National Tennis Center. (Sept. 7, 2013)
Credit: Newsday / J. Conrad Williams, Jr.
Novak Djokovic offers some kind words to Stanislas Wawrinka after defeating Wawrinka in five sets, 2-6, 7-6, 3-6, 6-3, 6-4 in the men's semifinals at the 2013 U.S. Open Tennis Championships at the USTA Billie Jean King National Tennis Center. (Sept. 7, 2013)
Credit: Newsday / J. Conrad Williams, Jr.
Novak Djokovic raises both his arms in victory after defeating Stanislas Wawrinka in five sets, 2-6, 7-6, 3-6, 6-3, 6-4 in the men's semifinals at the 2013 U.S. Open Tennis Championships at the USTA Billie Jean King National Tennis Center. (Sept. 7, 2013)
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Serbia's Novak Djokovic reacts after beating Spain's David Ferrer in a semifinal match at the 2012 US Open tennis tournament. (Sept. 9, 2012)
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Serbia' Novak Djokovic returns a shot to Spain's David Ferrer during a semifinal match at the 2012 US Open tennis tournament. (Sept. 8, 2012)
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Novak Djokovic of Serbia celebrates his victory over Andy Roddick of the United States at the All England Lawn Tennis Club in Wimbledon, London. (July 31, 2012)
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Serbia's Novak Djokovic serves during his men's singles semi-final match against Switzerland's Roger Federer on day 11 of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London. (July 6, 2012)
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Serbia's Novak Djokovic waves to the public after defeating Switzerland's Roger Federer during their semifinal match in the French Open tennis tournament at the Roland Garros stadium in Paris. (June 8, 2012)
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Novak Djokovic of Serbia plays a backhand in his quarter final match against David Ferrer of Spain. (Jan. 25, 2012)
Credit: Newsday / J. Conrad Williams, Jr.
Novak Djokovic reacts after breaking Stanisias Wawrinka during the second set of the men's semifinals in 2013 U.S. Open Tennis Championships at the USTA Billie Jean King National Tennis Center. (Sept. 7, 2013)
Credit: Newsday / J. Conrad Williams, Jr.
Novak Djokovic reacts after winning a break point against Mikhail Youzhny in the men's quarterfinals during the 2013 U.S. Open Tennis Championships at the USTA Billie Jean King National Tennis Center. (Sept. 5, 2013)
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Novak Djokovic of Serbia tosses the ball in the air to serve during his men's singles first round match against Ricardas Berankis of Lithuania on Day Two of the 2013 U.S. Open. (Aug. 27, 2013)
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Novak Djokovic, from Serbia, sports a wig as he celebrates his victory over Denis Istomin, from Uzbekistan, during third-round play at the Rogers Cup men's tennis tournament in Montreal. Djokovic won 2-6, 6-4, 6-4. (Aug. 8, 2013)
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Novak Djokovic of Serbia reacts during his Men's Singles semifinal match against Juan Martin Del Potro of Argentina on day eleven of the 2013 Wimbledon Championships. (July 5, 2013)
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Novak Djokovic of Serbia reacts after defeating Juan Martin Del Potro of Argentina in their Men's singles semifinal match. (July 5, 2013)
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Novak Djokovic of Serbia reacts after beating Tomas Berdych of the Czech Republic in a Men's Singles quarterfinal match. (July 3, 2013)
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Novak Djokovic celebrates match point during his fourth-round match against Tommy Haas on day seven of the Wimbledon Championships. (July 1, 2013)
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