2015 French Open - Day Four [Getty Images]

PARIS, FRANCE - MAY 27: Steve Johnson of the United States returns a shot during his men's singles match against Sergiy Stakhovsky of Ukraine during day four of the 2015 French Open at Roland Garros on May 27, 2015 in Paris, France. (Photo by Dan Istitene/Getty Images)

Getty Images Sport Dan Istitene