Bruce spent eight years as a player at Old Trafford, winning every honour possible under the guidance of the Old Trafford boss, and his success at Blues has earned the praise of his ex-manager.
"Steve's had the experience at other clubs which has helped him," Ferguson told Sky Sports News.
"He's taken Birmingham into the Premiership, which many managers for years had tried beforehand, and done very, very well.
"They consolidated well last year and have had a great start this year.
"They're a very determined side - they have good legs in midfield.
"We know what we're facing."
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