The 22-year-old has impressed in training since joining United from Molde in the summer.
Manchester United boss Sir Alex said earlier this month: “If you’re talking about value then you can look at our young boy Diouf.
“He’s been training with us and is looking very exciting. That’s the kind of situation we’re good at – finding young players who can develop at the club and at 22 years of age he’s looking very good.”
