In what was a lacklustre game at the Mestalla stadium, Javier Hernandez came off the bench to secure the points for United.
It took two subs combining with Kiko Macheda again making the difference at an important time setting up Hernandez who drilled low and hard past Cesar into the bottom corner.
Hernandez had gone close before, unable to direct the ball into the net when it dropped to him at the back post but when his chance came he took it well and also just as importantly we kept a clean sheet!
We now sit top of the group on 4 points joint with Rangers.