Stanislas Wawrinka, playing for the first time in the season-ending ATP World Tour Finals, defeated Tomas Berdych 6-3, 6-7 (0), 6-3 Monday in their opening round-robin match. To win my first match here was something really special.'' Wawrinka spent his career in the shadow of Roger Federer before reaching the semifinals at the U.S. Open this year. The two are playing in Group A, which includes top-ranked Rafael Nadal and David Ferrer. Group B features Roger Federer, Novak Djokovic, Juan Martin del Potro and Richard Gasquet. More...