Alessandro Petacchi Takes Win in Crash-Marred Stage 4 Finish
Heinrich Haussler and Mark Cavendish crash in final meters of stage 4 of 2010 Tour de Suisse; Tony Martin maintains overall race lead.
Armstrong wrote on his Twitter feed. "Nasty crash in the sprint that involved many. Damn, this game is dangerous. Hope all the guys are ok."
Wednesday's stage takes riders on a 172.5-kilometer (107.2-mile) course from Wettingen to Frutigen. The race ends Sunday with a time trial in and around Liestal.