US Open 2016

Gael Monfils, of France, returns a shot to Novak Djokovic, of Serbia, during the semifinals of the U.S. Open tennis tournament, Friday, Sept. 9, 2016,...

Gael Monfils, of France, returns a shot to Novak Djokovic, of Serbia, during the semifinals of the U.S. Open tennis tournament, Friday, Sept. 9, 2016,...

Gael Monfils, of France, returns a shot to Novak Djokovic, of Serbia, during the semifinals of the U.S. Open tennis tournament, Friday, Sept. 9, 2016,...

Novak Djokovic, of Serbia, returns a shot to Gael Monfils, of France, during the semifinals of the U.S. Open tennis tournament, Friday, Sept. 9, 2016,...

Novak Djokovic, of Serbia, reacts after defeating Gael Monfils, of France, during the semifinals of the U.S. Open tennis tournament, Friday, Sept. 9,...

Novak Djokovic, of Serbia, reacts after defeating Gael Monfils, of France, during the semifinals of the U.S. Open tennis tournament, Friday, Sept. 9,...

Novak Djokovic, of Serbia, reacts after defeating Gael Monfils, of France, during the semifinals of the U.S. Open tennis tournament, Friday, Sept. 9,...

Gael Monfils, of France, returns a shot to Novak Djokovic, of Serbia, during the semifinals of the U.S. Open tennis tournament, Friday, Sept. 9, 2016,...

Kei Nishikori, of Japan, lunges to return a shot to Stan Wawrinka, of Switzerland, during the semifinals of the U.S. Open tennis tournament, Friday, S...

Kei Nishikori, of Japan, chases down a shot from Stan Wawrinka, of Switzerland, during the semifinals of the U.S. Open tennis tournament, Friday, Sept...

Kei Nishikori, of Japan, returns a shot to Stan Wawrinka, of Switzerland, during the semifinals of the U.S. Open tennis tournament, Friday, Sept. 9, 2...

Caroline Wozniacki of Denmark shouts encouragement between points during her semifinal with Angelique Kerber in Arthur Ashe Stadium, at the U.S. Open...

Angelique Kerber of Germany runs down a return during her semifinal with Caroline Wozniacki in Arthur Ashe Stadium, at the U.S. Open in New York, Sept...

Angelique Kerber of Germany celebrates a point during her semifinal with Caroline Wozniacki in Arthur Ashe Stadium, at the U.S. Open in New York, Sept...

Angelique Kerber of Germany serves during her semifinal with Caroline Wozniacki in Arthur Ashe Stadium, at the U.S. Open in New York, Sept. 8, 2016. K...

Angelique Kerber of Germany hits a return during her semifinal with Caroline Wozniacki in Arthur Ashe Stadium, at the U.S. Open in New York, Sept. 8,...

Novak Djokovic of Serbia hits a return to Gael Monfils of France during their 2016 US Open men's singles semifinals match at the USTA Billie Jean Kin...

Gael Monfils of France hits a return to Novak Djokovic of Serbia during their 2016 US Open men's singles semifinals match at the USTA Billie Jean Kin...

Novak Djokovic of Serbia reacts to a point against Gael Monfils of France during their 2016 US Open men's singles semifinals match at the USTA Billie...

Gael Monfils of France serves against Novak Djokovic of Serbia during their 2016 US Open Men's Singles semifinal match at the USTA Billie Jean King Na...

An overhead view of the stadium as Novak Djokovic of Serbia plays against Gael Monfils of France play their 2016 US Open men's singles semifinals matc...

Gael Monfils of France reacts winning a set against Novak Djokovic of Serbia during their 2016 US Open Men's Singles semifinal match at the USTA Billi...

Gael Monfils of France hits a return to Novak Djokovic of Serbia during their 2016 US Open men's singles semifinals match at the USTA Billie Jean King...

Novak Djokovic of Serbia hits a return against Gael Monfils of France during their 2016 US Open Men's Singles semifinal match at the USTA Billie Jean...

Novak Djokovic of Serbia celebrates after defeating Gael Monfils of France during their 2016 US Open Men's Singles semifinal match at the USTA Billie...

Stan Wawrinka of Switzerland hits a return against Kei Nishikori of Japan during their 2016 US Open Men's Singles semifinal match at the USTA Billie J...

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Caroline Wozniacki (DEN)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Caroline Wozniacki (DEN)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER), Caroline Wozniacki (DEN)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Caroline Wozniacki (DEN)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Angelique Kerber (GER)

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Gael Monfils

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Gael Monfils

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Gael Monfils

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Gael Monfils

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Gael Monfils

photo: Wojciech Kubik/East News 08.09.2016. Nowy Jork. Turniej tenisowy US Open 2016. n/z: Serena Williams