Manchester United boss Sir Alex Ferguson has explained the absence of Nemanja Vidic for victory at Liverpool.

The Serbian, who completed back-to-back outings against Wigan and Galatasaray earlier this week, was left out of the Reds' 18-man squad for the 2-1 triumph.

"He was just feeling a bit tight round about his knee and we decided just to give him a break today," the boss told MUTV. "Hopefully he'll be alright next week."