Victory marked a special weekend for Di Giannantonio, who also finished second in Saturday's sprint .
I was struggling with the front (tyre) but I saw Pecco (Bagnaia) making little mistakes," a grinning Di Giannantonio said in a post-race interview.
Bagnaia lost the lead with four laps to go but the Ducati rider has still put one hand on the rider's championship after extending his lead over Martin to 21 points.
Up front, Di Giannantonio did not let up.
"We managed to do a perfect start, I tried to create a gap but Diggia (Di Giannantonio) was incredible.
Persons:
Racing's Fabio Di Giannantonio, Francesco Bagnaia, Jorge Martin, Di Giannantonio, Bagnaia, Luca Marini, It's, Martin, Marini, Marc Marquez, Yamaha's Fabio Quartararo, Jack Miller, Giannantonio, we've, Jorge, Rohith Nair, Toby Davis
Organizations:
Qatar, Prix, MotoGP, Circuit, VR46 Racing, Ducati, Thomson
Locations:
LUSAIL, Qatar, Bengaluru