Dimitar Berbatov is impressed by the talent coming through the Manchester United academy.
The striker admits his place is under threat thanks to the emergence of the club's FA Youth Cup winners.
"I am not 21 any more," he told the Manchester Evening News.
"There are many young and talented players now, including some from the academy. You can see that if you watch games on TV. All my life I have tried to prove myself. I have worked hard. Given a chance, I have tried to show what I can do. The last season is in the past. The goals I scored, what I did, I have done it. This is a new season. It starts all over again."
