Andy Roddick and John Isner advanced Tuesday to the second round of the Shanghai Masters. Roddick moved on after an ill Philipp Kohlschreiber of Germany retired in the second set. Kohlschreiber stopped while trailing 6-3, 2-1 after missing an easy overhead, shanking a forehand wide and double-faulting to drop his serve. Isner fought off five match points in the two tiebreakers to defeat Polish qualifier Lukasz Kubot 4-6, 7-6 (9), 7-6 (7). Isner served 24 aces, but failed to break Kubot. Read more: http://sports.espn.go.com/sports/tennis/news/story?id=5676538
