Ham somehow managed to avoid conceding from the resulting corner when both Hernandez and Jonny Evans went close during a frantic goalmouth scramble.
Anderson stung Jaaskelainen’s palms with a scorching effort from 25 yards on 72 minutes but United were otherwise wasteful in the final third. Crosses were overhit and passes misplaced time and time again, as the Old Trafford crowd grew growingly restless.
When Lindegaard produced a point-blank save to deny Carlton Cole an equaliser it rammed home the reality that West Ham were just one moment away from snatching a draw.
Thankfully for the majority of those inside Old Trafford, that moment never came (although substitute Modibo Maiga jinked inside and tried his luck from 12 yards and Nolan had an injury-time effort blocked) and Sir Alex’s men hung on to claim a hard-earned three points.