Manchester United boss Sir Alex Ferguson has warned midfield prospect Paul Pogba not to let greed ruin a bright future.

The 18-year-old French midfielder, whose move to Old Trafford in 2009 sparked a bitter dispute between United and his old team Le Havre, has yet to agree terms over a new contract amid speculation he might be a target for both Milan clubs or even Manchester City.

Pogba's current deal runs out at the end of the season, although a one-year option means United could keep him until the summer of 2013.

"He's got an agent who's obviously become a bit difficult but we're negotiating with this agent and we want the boy to stay," said Ferguson.

"If he doesn't want to stay, there's not a lot you can do about it.

"If he'd like to be a Manchester United player then he knows what to do. You hope he gets the right advice but it's also down to the individual.

"Matt Busby summed it up perfectly; you don't need to chase money at a club like Manchester United, it will eventually find you. If you're good enough, you will earn money and become rich playing for United, there's no doubt about it.

"It's one of these situations that they can chase the money early in their career but at the end it's not the same as if they'd stayed here.

"It's the decision the player has to take himself about where they think their best future will be. He just needs to look round about him to realise that."