Petrucci has just signed for Peterborough United on-loan.
He told Posh Player: "I tried to model myself on Francesco Totti. Sometimes you learn just from looking at players. I was watching and could learn and he's still playing and is one of my best idols but another was Zinedine Zidane.
"At United, the incredible winning mentality they have got is just unreal and you can learn so much from them. Speaking to people like Scholes, Giggs and [Rio] Ferdinand, all of them can give you something.
"Unfortunately, it's hard for a young player at United because there are so many great players, probably the best in the world. So you have to start at some point from somewhere and I'm very happy to be here. Hopefully, I can kick on and do well."