Carrick picked up an ankle complaint in England’s friendly against Spain last week.
There were reports that he could have suffered ligament damage but subsequent rumours suggested he will only be out for a few weeks.
Van Gaal confirmed that Carrick will be back “much quicker” than expected:
Louis van Gaal tells reporters Carrick's injury is not serious: "He shall be playing much quicker than everyone has written." #mufc
— Manchester United (@ManUtd) November 20, 2015
United’s squad depth is being tested ahead of the crucial Christmas period. Van Gaal has spoke before of how he likes having a smaller squad as it gives younger players a chance to work their way in but if the team picks up any more injuries then eyebrows will be start to be raised. It is unclear exactly how United will line up at Vicarage Road and it will be interesting to see how they cope.