Louis Van Gaal under pressure to start well at Man United according to Chris Coleman

Coleman comes up against van Gaal's Holland on Wednesday. Photo: PA

Wales manager Chris Coleman believes the pressure will be on for Louis van Gaal to deliver at Manchester United next season.

Coleman will pit his wits against the new United boss this week when his Wales side take on Holland in an international friendly in Amsterdam on Wednesday.

United have turned to Van Gaal, who is stepping down as Holland coach after this summer's World Cup, to revive their fortunes after a disappointing season under David Moyes.

Coleman told Press Association Sport: "It will be interesting to see what happens if Manchester United go through next season not winning anything because there is that possibility.

"Regardless of how easy they look on the eye if they haven't won anything what are they going to do?

"They are used to winning things and bossing situations and last season they didn't do that.

"I thought it would be hard for Moysey in the first year or two and I was disappointed as a fellow manager that he only got 10 months.

Dutch manager Van Gaal will take over United after the World Cup. Credit: PA

"I want to see what happens next season because Louis van Gaal is a quality manager but what are we going to say next year if Manchester United have not won anything?

"Is Louis van Gaal going to be out the door because he is going to need time to bed in with his own ideas.

"You are not a magician when you are a manager. Sometimes you go in and have an immediate response and that is good but sometimes you don't and it takes time - if you get the time - to try to mould it and do it your own way.

"That was what David Moyes was trying to do and I was disappointed because he is a British manager and we want to see them do well like Brendan (Rodgers) at Liverpool.

"He had a season and then he got it right.

"Van Gaal with all his experience I am quite sure he can do well there but it will be interesting to see how it works."