Novak Djokovic of Serbia celebrates after defeating Alexander Zverev of Germany in their ATP World Tour Finals men's singles tennis match at the O2 arena in London.
Novak Djokovic of Serbia celebrates winning a point against John Isner of the United States in their ATP World Tour Finals tennis match at the O2 Arena in London.
Novak Djokovic, of Serbia, holds the trophy after defeating Juan Martin del Potro, of Argentina, during the men's final of the U.S. Open tennis tournament, in New York.
Novak Djokovic, of Serbia, celebrates after defeating Juan Martin del Potro, of Argentina, in the men's final of the U.S. Open tennis tournament, in New York.
Novak Djokovic, of Serbia, celebrates after defeating Juan Martin del Potro, of Argentina, in the men's final of the U.S. Open tennis tournament, in New York.
Novak Djokovic, of Serbia, celebrates after defeating Kei Nishikori, of Japan, during the semifinals of the U.S. Open tennis tournament.
_350_630.jpg "Novak Djokovic")
Novak Djokovic, of Serbia, reaches for a shot from John Millman, of Australia, during the quarterfinals of the U.S. Open tennis tournament in New York.
Novak Djokovic, of Serbia, celebrates after defeating Richard Gasquet, of France, during the third round of the U.S. Open tennis tournament in New York.
Novak Djokovic, of Serbia, returns a shot to Tennys Sandgren, of the United States, during the second round of the U.S. Open tennis tournament, in New York.
Novak Djokovic, of Serbia, returns a shot to Tennys Sandgren, of the United States, during the second round of the U.S. Open tennis tournament, in New York.
Novak Djokovic, of Serbia, celebrates after winning the third set against Marton Fucsovics, of Hungary, during the first round of the U.S. Open tennis tournament, in New York.
Novak Djokovic, right, of Serbia, holds the Rookwood Cup after defeating Roger Federer, left, of Switzerland, during the finals at the Western & Southern Open tennis tournament in ...
Novak Djokovic, of Serbia, celebrates after winning his match against Grigor Dimitrov, of Bulgaria, at the Western & Southern Open tennis tournament in Mason, Ohio.
Novak Djokovic, of Serbia, runs down a shot from Grigor Dimitrov, of Bulgaria, at the Western & Southern Open tennis tournament in Mason, Ohio.
Novak Djokovic, of Serbia, keeps his eyes on the ball as he returns a shot to Peter Polansky, of Canada, during the Rogers Cup men's tennis tournament in Toronto.
He slew Nadal en route to the trophy; she tamed a rampaging Serena in the title clash. Sure, Novak Djokovic and Angelique Kerber have won themselves a right to have a ball at the W...
Men's champion Novak Djokovic and ladies' champion Angelique Kerber share a dance on stage at the Wimbledon Championships Dinner at The Guildhall in London.
Novak Djokovic of Serbia, left, holds the trophy after defeating Kevin Anderson of South Africa in the men's singles final match at the Wimbledon Tennis Championships in London.
Novak Djokovic of Serbia holds the trophy after defeating Kevin Anderson of South Africa in the men's singles final match at the Wimbledon Tennis Championships in London.
Novak Djokovic of Serbia celebrates defeating Kevin Anderson of South Africa in the men's singles final match at the Wimbledon Tennis Championships in London.
_110_165.jpg "Novak Djokovic")
