AURILLAC, France, July 14 : As happens every year, crashes have punctuated the opening week of the Tour de France, with several incidents highlighting how difficult it remains to manage concussion in a sport where the clock is always ticking.Of the eight riders who have abandoned the Tour since the race began

AURILLAC, France, July 14 : As happens every year, crashes have punctuated the opening week of the Tour de France, with several incidents highlighting how difficult it remains to…

Three of the eight riders who have abandoned the Tour de France in the opening week have suffered concussions.