MotoGP world champion Valentino Rossi has politely declined the chance to race a Ferrari, alongside former F1 star Jean Alesi, at next year's Le Mans 24 Hours race.

"I'm flattered by the offer from Jean," La Gazzetta dello sport reports Rossi as saying, "but June is the most challenging month of the [MotoGP] world championship, with three races scheduled, and so it is impossible to participate."

In a further sign of just how seriously Rossi is taking the 2010 MotoGP World Championship, the Italian superstar has also ditched a planned drive in the Mexican round of the World Rally Championship.

"Valentino has also declined to take part in the Rally of Mexico on 5-7 March because it is too near the start of the season," confirmed Rossi's Fiat Yamaha team manager Davide Brivio.

Rossi won his seventh MotoGP title by 45 points over team-mate Jorge Lorenzo this season, marking his closest title victory to date.