Hayden's sponsor DRIVE M7 posted this pic on Instagram showing Hayden watching during MotoGP qualifying.
After completing just 11 laps on Friday Hayden took the decision just moments before FP3 at the Gran Premio d'Italia TIM that he would not compete in the sixth round of the MotoGP World Championship.
The American has suffered with the problem since round four in Spain but treatment in between races has allowed him to continue racing. However, at such a demanding circuit as Mugello the swelling and pain became unbearable and the best option for 'The Kentucky Kid' was to pull out.
Hayden is scheduled to undergo arthroscopic surgery at 8am next Tuesday in Italy. The exploratory operation will be conducted by hand specialist Riccardo Luchetti, who will hopefully be able to identify the cause of the problem whilst cleaning up the affected area and reducing the swelling so that Hayden can return to competitive action as soon as possible.