Cycling - Bardet, Aru and Uran missed chance of a lifetime to win Tour

Cycling - The 104th Tour de France cycling race - Greg LeMond daily chat with Reuters - Duesseldorf, Germany - June 30, 2017 - Three-time Tour de France winner and Eurosport pundit Greg LeMond poses for Reuters. REUTERS/Christian Hartmann

LE-PUY-EN-VELAY, France (Reuters) - Chris Froome's closest rivals missed a unique opportunity to win the Tour de France after the defending champion was dropped off the favourites' group at a critical moment in Sunday's 15th stage, according to three-time champion Greg LeMond.

Froome suffered a mechanical problem when Romain Bardet's AG2R-La Mondiale were going full out and had split the bunch before the key climb of the day.