Tour de France director Christian Prudhomme has tested positive for Covid-19 but all the riders in the peloton were negative, organisers said on Tuesday.

Prudhomme must now leave the race for a week to go into quarantine.

Prudhomme, who is asymptomatic, said he had tested negative for coronavirus three times before the start of this year’s race on “the 6, 20 and 27 of August”.

His role as chief organiser means he attends a large number of social events during the race. On Saturday he accompanied French Prime Minister Jean Castex when the premier visited the race.