During an interview with the BBC
, Valentino Rossi warned that Yamaha must choose between keeping him or team-mate Jorge Lorenzo for the 2011 MotoGP season.
"Yamaha have to decide between me and Jorge for 2011," he said. "I have a great option to join Ducati."
Lorenzo has been Rossi's closest rival this year, only losing the title to the nine time world champion at the penultimate round of the season.
Rossi has repeatedly stated his displeasure at developing a bike that will also benefit his closest championship rival. 2009 marks the first time that Rossi's team-mate has finished second in the championship.
Both Rossi and Lorenzo will remain at Fiat Yamaha next season.