Sir Alex's side started to pose a threat from both flanks as Young's cross was headed on by Scholes but nodded over from close range by Hernandez and Wayne Rooney drifted an attempt off target after collecting a Hernandez header. Some sloppy play by the Swans gifted Scholes posession in a dangerous position and, although Rooney picked up the veteran's pass and saw a shot blocked by Rangel, Young was on hand to steer a precise finish into the corner of the net.
Defenders Jones and Chris Smalling also had efforts on goal towards the end of the half as, after being slow to reach top gear, United really started to lift the mood around the ground. But any hopes that the Reds would really go gung-ho in the second half were misplaced as Gylfi Sigurdsson forced David De Gea to shovel his shot uncomfortably behind.
There was a lightning break, instigated by Scholes' brilliant pass out of defence, but Dyer prevented Rooney's cross from finding Young and, when the former Villa winger did get an opening soon afterwards, his drive deflected off Ashley Williams to wrongfoot Vorm but went the wrong side of the keeper's right-hand post.
Hernandez headed over from another promising position following a Valencia cross but Swansea remained a threat as De Gea managed to keep out Danny Graham after the striker helped on a Joe Allen shot. And the two teams continued to trade efforts in an end-to-end affair with Valencia's shot blocked by Taylor, Dyer firing wide when off balance and De Gea diving to save a Sigurdsson free-kick.