Clearly dismayed by repeated questions about doping, the team of Tour de France leader Chris Froome earlier today volunteered to open up to independent scrutiny all of its training secrets to try to prove "beyond reasonable doubt" that the Briton and his teammates are riding clean.

Chris Froome (Sky) has won on Mont Ventoux. The Sky man surged away from Nairo Quintana (Movistar) with 1.2 km left to win Stage 15, a 242-km ride from Givors to Mont Ventoux, in 5:48:45. Quintana finished second at 0:29, and Mikel Nieve (Euskaltel-Euskadi) finished third at 1:29. Froome has extended his overall lead in the Tour de France.

Chris Froome climbs to victory on Mont Ventoux for Team Sky Pro Cycling and increases his overall Tour de France lead.

Complete results from stage 14 of the Tour de France 2013.

Stage 13 was supposed to be an uneventful transition stage that the sprinters would decide. The cycling gods, however, decreed otherwise. Mark Cavendish (Omega Pharma-Quick Step) took a sprint from Peter Sagan (Cannondale) and Bauke Mollema (Belkin) to win the flat, 173-km run from Tours to Saint-Amand-Montrond in 3:40:08, but Cavendish’s victory paled in importance next to the elimination of Alejandro Valverde (Movistar) as a GC threat and the rise of Mollema and Alberto Contador (Saxo Bank-Tinkoff). Chris Froome (Sky) remains the maillot jaune, but his lead has been reduced and he and his team have been shown to be vulnerable.

Mark Cavendish powers to victory in stage 13 of Tour de France 2013; Chris Froome's overall Tour de France lead reduced to 02:28 minutes.

Marcel Kittel (Argos-Shimano) has won his third stage of this year’s Tour de France. Kittel took a crash-marred bunch sprint to win Stage 12, a flat, 218-km run from Fougeres to Tours in 4:49:49. Mark Cavendish (Omega Pharma-Quick Step) finished second, and Peter Sagan (Cannondale) finished third. Chris Froome (Sky) remains the yellow jersey.

German Marcel Kittel sprints to third stage victory in Tour de France for Team Argos-Shimano; Team Sky's Chris Froome preserves overall Tour de France lead.

Tony Martin (Omega Pharma-Quick Step) has won Stage 11 of the Tour de France 2013. The German, who suffered a concussion, among other injuries, in a Stage 1 crash, powered over the flat, 33-km course from Avranches to Mont Saint-Michel in 36:29. Chris Froome (Sky) was the only rider to finish within 1:00 of Martin, finishing 0:12 behind the Omega Pharma-Quick Step man. Thomas De Gendt (Vacansoleil-DCM) took third at 1:01. Froome remains the yellow jersey, and he extended his lead today.

World Champion Tony Martin powers to time trial victory in stage 11 of Tour de France 2013; Christopher Froome increases overall Tour de France lead.