Andy Murray of Great Britain serves against Jo-Wilfried Tsonga of France during their men's singles fourth round match on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 8
The tournament draw is adjusted on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Matthew Stockman/Getty Images)
2014 US Open - Day 8
Jo-Wilfried Tsonga of France returns a shot against Andy Murray of Great Britain during their men's singles fourth round match on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Chris Trotman/Getty Images for USTA)
2014 US Open - Day 8
Orlando Luz of Brazil plays against Simon Friis Soendergaard of Denmark during their junior boys' first round match on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 8
Serena Williams of the United States celebrates match point to defeat Kaia Kanepi of Estonia in their women's singles fourth round match on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 8
Sunset over Manhattan on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 8
A general view of Arthur Ashe Stadium on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 8
Stan Wawrinka of Switzerland celebrates a point against Tommy Robredo of Spain on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Al Bello/Getty Images)
2014 US Open - Day 8
Victoria Azarenka of Belarus celebrates match point against Aleksandra Krunic of Serbia on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Al Bello/Getty Images)
2014 US Open - Day 8
Comedian Jay Pharoh looks on during Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Al Bello/Getty Images)
2014 US Open - Day 8
Victoria Azarenka of Belarus returns a shot to Aleksandra Krunic of Serbia during their women's singles fourth round match on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 8
A child swirls his shirt on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Al Bello/Getty Images)
2014 US Open - Day 8
Heidi Klum supports Milos Raonic of Canada in his match against Kei Nishikori of Japan on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 8
Kei Nishikori of Japan plays a backhand in his match against Milos Raonic of Canada on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 8
Kei Nishikori of Japan celebrates defeating Milos Raonic of Canada on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014. (Photo by Julian Finney/Getty Images)
