Tommy Robredo of Spain celebrates match point against Nick Kyrgios of Australia on Day Six of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 30, 2014. (Photo by Al Bello/Getty Images)
2014 US Open - Day 6
Tommy Robredo of Spain is congratulated by Nick Kyrgios of Australia on Day Six of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 30, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 6
A general view of Nick Kyrgios of Australia in his match against Tommy Robredo of Spain on Day Six of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 30, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 6
Nick Kyrgios of Australia reacts after losing a point to Tommy Robredo of Spain on Day Six of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 30, 2014. (Photo by Al Bello/Getty Images)
2014 US Open - Day 6
Varvara Lepchenko of the United States in action against Serena Williams of the United States during their women's singles third round match on Day Six of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 30, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 6
Eugenie Bouchard of Canada in action against Barbora Zahlavova Strycova of the Czech Republic on Day Six of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 30, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 6
Luke Wilson watches on as Barbora Zahlavova Strycova of the Czech Republic plays against Eugenie Bouchard of Canada during their women's singles third round match on Day Six of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 30, 2014. (Photo by Julian Finney/Getty Images)
2014 US Open - Day 6
Bob Bryan and Mike Bryan of the United States compete in a second round men's doubles match against Jared Donaldson and Michael Russell of the United States on Day Six of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 30, 2014. (Photo by Al Bello/Getty Images)
