Thierry Gouvenou, race director of Paris-Roubaix, believes he has identified a fatal error. The rapid pace of descents is one reason for the increasing number of falls in cycling, he says.

On Thursday, top stars Jonas Vingegaard and Remco Evenepoel, among others, suffered serious bone fractures in a mass fall during the Tour of the Basque Country. The previous week, top star Wout van Aert fell badly in a race and also had to go to hospital.