PARIS, FRANCE - MAY 25: Jack Sock of USA during practice three days ahead of the start of 2017 French Open at Roland Garros stadium on May 25, 2017 in Paris, France. (Photo by Jean Catuffe/Getty Images)
PARIS, FRANCE - MAY 25: Jack Sock of USA during practice three days ahead of the start of 2017 French Open at Roland Garros stadium on May 25, 2017 in Paris, France. (Photo by Jean Catuffe/Getty Images)