Rio Ferdinand has fears that Manchester United may regret letting Nemanja Vidic leave to Inter Milan this summer, Daily Mail reports.

The English centre-back believes the Red Devils could be repeating their mistake of letting Jaap Stam leave Old Trafford – back in 2001 – by letting go of Vidic this time around.

The United captain will leave for Inter on a free transfer when the window reopens, signalling an end to a successful eight year spell with the club.

Former Man United boss David Moyes previously stated the move was “the right decision for club and player”, but Ferdinand insists that: “Only time will tell if Manchester United regret allowing him to leave.

“Obviously Jaap Stam played on for quite a few years at a good level after he left Man United and the same thing could happen with Nemenja. He’s a great player and it’s a shame he had to leave.”

On another note, Ferdinand expects team-mate Wayne Rooney to shine at this summer’s World Cup, after failing to impress in every major international tournament since Euro 2004.

“He has always limped into a tournament, he has always had problems injury wise,” he said.

“If you get a fresh Wayne Rooney going into a tournament, like we saw in Euro 2004, when he was young and fresh with no injuries, you saw a guy who frightened teams to death.

“I think he still has the capability to do that. You see that in a Manchester United shirt often enough. If he goes into a tournament fit, it gives England a better chance of doing well because he scores goals. Simple as that.”