Tsonga and Del Potro Into French Open Quarters
World number nine-ranked Juan Martin del Potro of Argentina set up a 2012 French Open quarterfinals match against third-ranked Roger Federer of Switzerland by finishing off a 7-6(6), 1-6, 6-3, 7-5 over Tomas Berdych on Monday in a match stopped the night before due to darkness after three sets. The seventh-seeded Berdych lost to del Potro at…

