Report: M. Schumacher not ruling out F1 comeback

SAO PAULO -- Michael Schumacher says he has fully healed from his neck injury and indicated that he has not ruled out a return to Formula One next season.

Schumacher made the comments in Brazil, where he competed in a charity karting race hosted by former Ferrari teammate Felipe Massa.

When asked by local reporters whether he would be back in F1 in 2010, the German told the Terra website and other media: "Who knows?"

Schumacher said Sunday he has recovered from the neck injury that kept him from attempting a temporary comeback with Ferrari earlier this year.