MotoGP world champion Casey Stoner is aiming for a return to action at his home grand prix at Phillip Island in October.

The Australian suffered fractures and torn ligaments in his ankle during qualifying for the Indianapolis Grand Prix but managed to finish fourth in the race despite the serious injuries.

Stoner, who will retire from MotoGP at the end of the season, will undergo specialist surgery in Australia and could face several weeks on the sidelines.

However, the Repsol Honda rider is eager to bow out of the sport with a sixth successive victory at Phillip Island on October 28.

"Being at Phillip Island is definitely my goal at the moment," Stoner said.

"I would like to be ready one race before then as long as things are set so I can't cause any more damage, then I'll have a go.

"I don't really care about pain but if there is any chance of doing huge damage then there is no point.

"I'm definitely planning to be fit and ready for the Island, it is the one race I don't want to miss.

"Until I have the surgery I can't say exactly when I can return."

The 26-year-old is third behind Spanish pair Jorge Lorenzo (Yamaha) and Dani Pedrosa (Repsol Honda) in the championship standings but ruled out the possibility of postponing retirement in a bid to end his career as a world champion in 2013.

"I'm not in this championship to wait and finish it perfectly in a big fairytale," he said.

"I'm not racing next year. I could have a similar issue and something else could go wrong.

"I still have a season to complete, I want to get back to racing as soon as possible."