Fred signed for United before the World Cup from Shakhtar Donetsk.
Gilberto Silva said: "He's a mixture of a no.6 and a no.8. He can play in both positions and he played in many different roles in his early days, including as a winger.
“He's a real box-to-box midfielder and his final pass is really good. The combination with Fred can really help Pogba. With Fred, Pogba can be more free to go forward and help the guys up front, as he likes to do.
“I'm looking forward to seeing the combination with Fred, Pogba and Matic, and how Jose is going to use them."