Andreas Pereira has been arguably Manchester United’s standout performer during the club’s pre-season tour of the United States.
He eventually capped off his fine performance against San Jose with a goal by heading in Jesse Lingard’s ball into the box.
Van Gaal may well be persuaded to start the 19-year-old against Barcelona as a result.
Elsewhere, David de Gea could return from injury to face Luis Enrique’s side after he missed United’s two previous fixtures.
There have been rumours that his absence may have something to do with his potential move to Real Madrid but van Gaal’s comments after the San Jose game appear to suggest that he is genuinely injured.