The Manchester United boss also paid tribute to Bulgarian striker Dimitar Berbatov, who set up the Carlos Tevez goal which separated the visitors from 10-man Stoke following Andy Wilkinson's dismissal.
"You start to worry a bit as the second half looked a bit of a stalemate," said Ferguson.
"Then Dimitar showed great balance and turned the defender brilliantly before playing the ball across to Carlos to finish it off. We were delighted about that."
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