French Open 2015: Second Round (56 images)

Marcel Granollers of Spain hits a serve during his French Open men's second round match against Roger Federer of Switzerland at Roland Garros in Paris on May 27, 2015. Federer defeated Granollers 6-2, 7-6 (1), 6-3 to advance to the next round. Photo by David Silpa/UPI

Roger Federer of Switzerland hits a shot during his French Open men's second round match against Marcel Granollers of Spain at Roland Garros in Paris on May 27, 2015. Federer defeated Granollers 6-2, 7-6 (1), 6-3 to advance to the next round. Photo by David Silpa/UPI

Stan Wawrinka of Switzerland hits a shot during his French Open men's second round match against Dusan Lajovic of Serbia and Montenegro at Roland Garros in Paris on May 27, 2015. Wawrinka defeated Lajovic 6-3, 6-4, 5-7, 6-3 to advance to the next round. Photo by David Silpa/UPI

Stan Wawrinka of Switzerland hits a shot during his French Open men's second round match against Dusan Lajovic of Serbia and Montenegro at Roland Garros in Paris on May 27, 2015. Wawrinka defeated Lajovic 6-3, 6-4, 5-7, 6-3 to advance to the next round. Photo by David Silpa/UPI