Troy Bayliss may have said "the only pressure is in my tyres" but for countryman Casey Stoner it was a case of too much pressure in his tyres at Mugello on Sunday.

The Repsol Honda rider looked set to extend his MotoGP title lead as he led from pole and quickly pulled a two-second advantage over the rest of the field.

But the Australian's pace peaked on lap 7 of 23 and he was later reeled in and passed by Jorge Lorenzo (lap 18) and the team-mate Andrea Dovizioso (lap 23).

"We started the race very strong and everything felt fantastic on the bike, however, we had a problem with the tyres after a few laps," said Stoner, winner of four races this year.

"We believe this was related to incorrect tyre pressures for today's track temperature and we should have probably reduced them a little compared with what we used in warm-up because as soon as the tyres got up to a certain pressure, I lost all the grip in the rear and this led to me starting to close the front.

"I think this is why we were able to be so fast in the beginning of the race, as the tyres were able to warm up very quickly, but then the tyre overheated and I lost all the grip.

"I'm disappointed as our potential to win today was high, I thought I might still have potential to fight with Jorge and Andrea, but Jorge came past and he was too fast for me. Then Andrea came past and I thought I could respond, but I didn't have any traction.

"It's still a podium, and important points but I'm here to win races".

Stoner lead over Lorenzo has now been reduced to 19 points.