By GMM

Valentino Rossi says it is "very unlikely" that he will do any more Formula 1 testing for Ferrari in the foreseeable future.

The multiple MotoGP world champion tested the Maranello built cars several times a couple of years ago, sparking intense speculation that he could make the switch to four wheels.

The seeds of new rumours have now been sown with the continuing sponsorship link between his Yamaha team and Fiat, the 85 per cent owner of Ferrari, and whispers that he may leave MotoGP as early as the end of 2008.

"At the moment I really don't know how long I will stay in MotoGP," the Italian told the German magazine Auto Bild. "A lot depends on how competitive we (Yamaha) are next year."

But Rossi insists to the Italian sports daily La Gazzetta dello Sport that more testing for Ferrari is "very unlikely" for the time being.

Instead, he is reportedly lining up a sports car test in Audi's Le Mans prototype R10, while last weekend he won the Monza Rally in a Ford Focus.