Fosu-Mensah has been one of the standout performers for United this season that has seen him force his way into Louis van Gaal’s starting XI.
But Mills, while admitting he has great potential, doesn’t believe he has proven himself at the top level just yet.
He said: ”Young players often do well for the first four or five games, then tail off a bit. Sometimes a little bit of reality kicks in, it’s whether they can do it seven to 20 games. You’ve never quite made it until you’ve played 50 games.
Manchester United v Aston Villa - Premier League match preview
“It’s different as a striker, you get thrown on for 10 minutes and if you give the ball away you’re 70 yards from goal.
“If you’re a defender, you make a mistake it ends up in the goal and you can’t get back from that. He’s got a lot of potential and looks a good prospect for the future, but that’s all it is at the moment.”
Invalid email
We use your sign-up to provide content in ways you've consented to and to improve our understanding of you. This may include adverts from us and 3rd parties based on our understanding. You can unsubscribe at any time. Read our Privacy Policy