Martina Hingis plays in the women's doubles match at the U.S. Open in New York

Martina Hingis of Switzerland questions the chair umpire's call as she and teammate Daniela Hantuchova of Slovakia take on Sara Errani and Roberta Vinci of Italy during the women's double match at the U.S. Open Championship held at the USTA Billie Jean King National Tennis Center on August 30, 2013 in New York City. UPI Photo/Monika Graff