The Manxman collided with a parked car on stage six and fell heavily on his shoulder – the same one he injured at the Tour de France in 2014.
But while x-rays showed the all-clear, with no broken bones, Cavendish is not able to train and is still in pain from the incident, which could force his withdrawal from the Worlds.
“I’ll make a decision [on whether to go to Richmond] on Friday,” he said at the launch of the Abu Dhabi Tour. “I had an X-ray which showed it wasn’t broken. It wasn’t hanging off like last year. But it’s worse than I feared.”
Mark Cavendish’s Specialized Venge
Great Britain’s nine-man squad for the road race has already suffered two setbacks, with Team Sky duo Chris Froome and Geraint Thomas withdrawing because if injury and exhaustion respectively.