Manchester United coach Rene Meulensteen has revealed how Fabio da Silva was actually ahead of brother Rafael before his shoulder injury at the start of the season.
He told manutd.com: "Another good prospect. He was probably a bit more advanced than Rafael when they arrived, but he's had a setback with his shoulder injury. Hopefully he can follow in his brother's footsteps.
"He's naturally right-footed, but very comfortable at left-back. Both brothers come from a different football culture, in which full-backs play a more advanced role. I and Ole [Gunnar Solskjaer] did some work with them on positional play and looked at how, over here, a back four plays as more of a unit."