Monster Yamaha's Cal Crutchlow has undergone successful surgery to screw and plate the left collarbone he broke in a qualifying crash which ended his participation at the Silverstone MotoGP round after scans showed there was no damage to his neck as first feared.

Initial checks at the John Radcliffe Hospital in Oxford showed a suspected non-displacement fracture of his C2 vertebrae, but subsequent CAT scans showed no damage to his neck, and he was immediately transferred to the Royal Derby Hospital to have the collarbone, which is in five bits, put back together.

"The operation on my collarbone was a success and the doctors seems really happy with the outcome. But I am still in a lot of pain. Unfortunately, the break is a lot worse than the one my team-mate Colin Edwards had in Catalunya and I've got different pain and movement levels," said Crutchlow.

"And I've spent two days lying on my back with a suspected neck injury, so my shoulder just got swollen. I am not very happy that this happened to me in my home race at Silverstone when things were going really well for the weekend. I don't know if I will ride in Assen. We will have to wait and see, but I'll be trying 100 per cent to be there if I can.”