Luxembourg's Frank Schleck and Dutch climbing specialist Robert Gesink have both pulled out of Wednesday's Fleche-Wallonne race, and are doubtful for Sunday's Liege-Bastogne-Liege.
Schleck's injuries came after his fall in the Amstel Gold Race, his Saxo Bank team revealed on Tuesday. Schleck was taken to hospital after falling spectacularly during the Dutch race on Sunday but was discharged shortly afterwards.
The 29-year-old had hoped to compete in all three Ardennes classics this season, but his team said the seriousness of his fall prompted them to take extra precautions.
Gesink pulled out of Fleche-Wallonne because of a painful right knee.
The 22-year-old -- fourth in last year's race -- felt the pain towards the end of Sunday's one-day classic Amstel Gold Race, in which he finished third.
A subsequent scan persuaded team doctors that he should have two days' complete rest and re-start training on Thursday, when a decision will be taken on whether he competes in the Liege-Bastogne-Liege classic next Sunday.
© BikeRadar & AFP 2009