Ben Foster has accepted he will have to leave Manchester United if he is going to revive his career as a goalkeeper. Foster was looking to be United’s number one at one time and even Sir Alex Ferguson believed that the 27 year old would be in with a good chance of getting to the World Cup finals. But things started to go wrong for Foster when he made a couple of balls ups when in the first team. Then the England manager kept faith in the keeper and picked him to play for his country against Brazil and Belarus. But he stopped getting regular football for United and his place in the England squad passed by. "You never want to leave Manchester United," he told the Manchester Evening News. "If you leave this club you are only ever going to go down. "But I want to be playing football. I am not interested in just hanging around and I would go if the club wanted to sell me. "If they are happy to accept a bid then you have to read between the lines and realise you are not really needed and move on. It would not be the end of the world for me."