Manchester United were fairly solid but lacking a killer instinct in front of goal as they drew 0-0 with Inter Milan before winning on penalties.
Van Gaal's men played some decent stuff, but ultimately couldn't find a way through and had to go to a shootout, where they dispatched five out of five penalties to earn a second win of the tournament.
United looked more comfortable on the ball than in the Roma game, and threatened early from a Phil Jones header which Samir Handanovic clawed away with an excellent save, with United unable to turn the ball in on the rebound.
United's passing was looking sharp, and they very nearly found a way through courtesy of a great move involving Rooney, Herrera, Mata and Welbeck, but the ball in was cut out before the finishing touch could be applied. Mata went close soon after too, with a drive which struck the side-netting.
The multiple changes at half-time led to United's passing game deteriorating, however, although there were some near misses to come. Wilfried Zaha operated as a striker, showing some occasional flashes, while Tom Cleverley had a good penalty shout turned down and Nani almost broke through twice. David de Gea, a half-time substitute, was also called into action to tip away a fierce Fredy Guarin free-kick, but the match ended goalless.
Young, Hernandez, Cleverley, Kagawa and Fletcher were then required to get United an extra point from the spot, and kept it up as they dispatched all of their spot-kicks with relative ease, with Marco Andreolli hitting the woodwork to give United the win.