Xerox Ducati rider Michel Fabrizio's debut MotoGP ride at the weekend's Brno meeting was brought to a premature end after the Italian rider had to pull in because of a damaged shoulder.

He was riding with the Pramac Ducati team as a stand-in rider for Mika Kallo, himself replacing the ill Casey Stoner, but after a fall in Friday practice the shoulder he injured was too damaged to continue past lap seven.

"After some laps I felt more and more pain on the right shoulder injured on Friday and I couldn’t almost use the brake anymore. I had to stop otherwise I would have risk to fall," said Fabrizio.

"I have torn the right shoulder muscle and it seem to have a golf ball under the skin. I am sorry for the Pramac Racing that gave me this opportunity.”