The former Manchester United midfielder hit a screamer for his first. The half-volley from 32 metres hit the underside of the bar to give the Udinese keeper no chance. The shot was clocked at 101km/h.
The French youngster's second was another thumping drive, this time low into the far corner of Diego Padelli's net.
It was the French 19-year-old's fourth goal in 13 games since his controversial defection from United.