Jack Sock beat Bulgaria's Grigor Dimitrov during their first round match at the Roland Garros on Tuesday in Paris.
Jack Sock beat Bulgaria's Grigor Dimitrov during their first round match at the Roland Garros on Tuesday in Paris. David Vincent AP
Jack Sock beat Bulgaria's Grigor Dimitrov during their first round match at the Roland Garros on Tuesday in Paris. David Vincent AP

Jack Sock and doubles partner Vasek Pospisil advance to third round of French Open

May 29, 2015 12:42 PM