Boonen undergoes surgery

Tom Boonen visited the race

Tom Boonen visited the race (Image credit: Hedwig Kröner)

Tom Boonen has had to undergo surgery in order to heal his injured left knee, which kept him from racing the Tour de France. The Quick Step leader was operated on Thursday morning in a hospital in Herentals, Belgium, and will now have to rest "three to four weeks" according to his team doctor.