2015 French Open - Day Seven [Getty Images]

PARIS, FRANCE - MAY 30: Jack Sock of the United States returns a shot in his men's singles match against Borna Coric of Croatia on day seven of the 2015 French Open at Roland Garros on May 30, 2015 in Paris, France. (Photo by Dan Istitene/Getty Images)

Getty Images Sport Dan Istitene