Valentino Rossi "The Doctor's"Valentino Rossi made his much anticipated debut on board the Ducati Desmosedici on Tuesday. The Italian turned laps at the Valencia circuit as part of a two-day MotoGP test along with 16 other riders (view the results in our 2010 MotoGP Valencia Day 1 Test Results). The 31-year-old hopped aboard the Ducati wearing plain black leathers, contrasted strongly by his neon