Manchester United boss Louis van Gaal admits that he is quite surprised by how valuable Anthony Martial has become for Manchester United in such a short time and the way he has adapted to life with the Red Devils so fast.

The Dutchman was confident about the buying quality when he offered Monaco £36million in the summer transfer window, and the French striker has scored five goals in his nine games just to prove van Gaal right.

But despite making a good progress, even he never expected Martial’s astonishing consistency from the moment he bagged that brilliant debut goal against Liverpool just 23 minutes after coming on.

Martial continued his hunt for goals by scoring the Red Devil’s equaliser against CSK Moscow in the champions league encounter and Van Gaal admits the France international’s consistency is a bit unusual for a 19-year-old player.

“I’m not surprised by him, no, because we have analysed him and bought him because of our analysis,” told the United manager.

 “In the consistency, he has surprised me, but in terms of his ability, no. Because we have known already for a long time he can do it. He has to adapt to our philosophy. That is a big point. He is adapting quickly, but he has to adapt and develop himself more. He is going great though.

“Young players are not normally consistent – they’re still looking for their identity in football. That’s why I have asked for time for him. But I have said that Anthony is rather good and consistent, even though he is still looking for his own identity at this level of football.”

Van Gaal is now hoping that Anthony Martial can continue this excellent form in the Manchester derby also and victory over Manchester City at Old Trafford on Sunday would guide the Red Devils back above the bitter city rivals.

Although, Manchester United boss claimed repeating the win of last season in the upcoming derby would not prove they are better than Manchester City now.