Sir Alex Ferguson has admitted Manchester United old boy Carlos Tevez has already made his presence felt following his return to duty for Manchester City.

Ferguson branded Roberto Mancini's decision to recall Tevez after five months as an outcast an act of desperation. After a slow start, Tevez has begun to repay the faith, scoring a hat-trick at Norwich a fortnight ago, and he is primed to face his former club - having already found the net three times in five previous games against them.

"We have not watched the games a lot, but he scored a hat-trick," Ferguson said. "That is an impact. We will just have to wait and see what he does on Monday."

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