So much for the thought that this might be the year Venus Williams would make a strong showing at the French Open. So much for the thought that she and her younger sister Serena Williams, the tournament's two top-seeded women, could deliver another all-Williams Grand Slam final. Displaying little of the spark or strokes she regularly produces on grass and hard courts, and playing little like someone with the tour's best 2010 winning percentage, Williams stalled on the red clay of Roland Garros yet again Sunday, exiting in the fourth round with a 6-4, 6-3 loss to No. 19 Nadia Petrova. http://sports.espn.go.com/sports/tennis/french10/news/story?id=5233726