After a sluggish first half, the Old Trafford side claimed all three points in Group C with two penalties from Wayne Rooney, helping put his side onto eight points and into second place.
The but victory was marred by a straight red for Vidic after United's first goal for a lunge on Gabriel Giurgiu.
“He’s raised his foot and in the context of referee’s interpretation, especially in Europe, I can see why he’s given the red card, but it’s very harsh I think," Ferguson told Sky Sports.
When asked whether the Old Trafford side would look to appeal the dismissal, the Scot added: “I don’t think you can win these things.”
A trademark Nemanja tackle it was...