Following a successful shakedown test at the hands of Franco Battaini and Vittoriano Guareschi, Ducati has announced that its MotoGP race riders Valentino Rossi and Nicky Hayden will try the 2012 Ducati at Jerez.

Today (Friday) will see Rossi ride the GP12, with Hayden getting track time on Saturday - at the same circuit where he took Ducati's first podium of the season last Sunday.

With the Ducati test team concentrating on development of this year's GP11, Rossi and Hayden will be supported by race team mechanics and engineers - under the supervision of technical director Filippo Preziosi - for the GP12 test.

2012 MotoGP rules allow a maximum engine size of 1000cc, although it is not clear if Ducati (or the other manufacturers) will use the full capacity allowed.

Ducati is the first of the MotoGP manufacturers to let its race riders test the 2012 bike. Both Rossi and Hayden are already under contract with the Italian factory until the end of next season.