Radek Stepanek has been ruled out of Wimbledon and the Czech Republic's Davis Cup quarterfinal against Chile next month because of a left knee injury. "His health problems are more serious than he expected," Czech Davis Cup captain Jaroslav Navratil said in a statement posted on the website of the country's tennis federation Thursday. No. 18 Stepanek was seeded 22nd for Wimbledon, which begins on Monday. http://sports.espn.go.com/sports/tennis/wimbledon10/news/story?id=5295955
