Seven-time MotoGP champion Valentino Rossi and double World Superbike champion Max Biaggi - who recently announced his retirement from the sport – were also present in the inaugural running of the Sic Supermoto Day.
Held on the new Latina circuit in Italy, the event paired road race and Supermoto stars for a 58-lap race (a tribute to Simoncelli's race number).
It was Dovizioso and team-mate Mauno Hermunen who triumphed, with Rossi finishing third and Biaggi eighth.
Dovizioso was recently forced to sit out Ducati's three-day private test at Jerez with a neck injury but was able to compete due to the slower speeds in Supermoto.
Marco's father Paolo was present to hand out the awards.