The official press release from Ducati:
Brno (Czech Republic) August 15th 2010 - Ducati and Valentino Rossi have signed a two year agreement for the nine-times World Champion to race with the "Rossa" of Borgo Panigale in the Ducati Marlboro Team from 2011.
The arrival of Valentino in Ducati opens a new and exciting chapter in the Italian factory's sporting history and, indeed, of the whole MotoGP Championship. The opportunity of lining-up such an extraordinary rider and character is considered by Ducati to be a huge value to the whole Ducati MotoGP project.
"We are delighted to announce that Valentino Rossi will be with us from 2011," commented Gabriele Del Torchio, President of Ducati Motor Holding. "He is a paragon of excellence in the world of motorcycling, coherent with our Italian company which is a standard-bearer for "made in Italy" excellence. These are key values for success in technology, design and sportsmanship. In addition to the strong and passionate intent of both parties, this agreement has been made possible by the committed support of our shareholder Investindustrial and all the sponsors associated with the Ducati Marlboro Team, sponsors which have believed in this opportunity and share and support our choices, De Torchio added.
"Firstly, Valentino is a great fan of motorcycles and so it has always been a pleasure for me to listen his opinions," said Filippo Preziosi, Ducati Corse General Director. "Until the Valencia GP he will remain a competitor, one so great that he has always given a special value to our victories, but as soon as he rides the Ducati for the first time, we will work together on every single detail that will develop a bike capable of showing his huge talent. Working with Valentino is one of the most exciting things for every engineer and it's good to know we will have this opportunity next season."