2016 U.S. Open - Day 7 Jo-Wilfried Tsonga of France in action against Jack Sock of the United States in the Men's Singles round four match on Louis Armstrong Stadium on day six of the 2016 US Open Tennis Tournament at the USTA Billie Jean King National Tennis Center on September 4, 2016 in Flushing, Queens, New York City. (Photo by Tim Clayton/Corbis via Getty Images)
