Juan Martin del Potro got past Richard Gasquet to win his opening round-robin match at the ATP World Tour Finals on Monday. Stanislas Wawrinka grabbed the spotlight with a win in his maiden appearance at the season-ending tournament. After Wawrinka defeated Tomas Berdych 6-3, 6-7 (0), 6-3 in Group A, Del Potro beat Gasquet 6-7 (4), 6-3, 7-5 to secure crucial points in a tough Group B that also includes Roger Federer and Novak Djokovic, who will be facing off on Tuesday. Playing in the tournament for the first time since 2007, Gasquet produced some stunning shots but struggled to return del Potro's big serve in a match laced with unforced errors and winners from both sides. More...