"He was involved in an incident this morning," a United spokespersonhas said.
"No other cars were involved.
"He's fine and is training as normal with the team this morning."
Greater Manchester Police confirmed: "At about 10.20am police were called to the A538 Wilmslow Road near to Manchester Airport following reports of a road traffic collision.
"Officers attended and discovered a Ferrari had collided with a barrier.
"No one is believed to have been injured.
"Inquiries are continuing."