Joe Hart has warned Manchester City they need to bounce back instantly from their Boxing Day disappointment at Sunderland if they are to defend their title.
The Barclays Premier League champions slipped seven points off the pace being set by derby rivals Manchester United when they succumbed to old boy Adam Johnson's lone strike at the Stadium of Light.
City head for Norwich on Saturday under orders from manager Roberto Mancini to become more ruthless in front of goal. Hart told citytv: "It's how football goes sometimes. I don't think we have not tried or not given 100 per cent or not shown quality, it's just that it wasn't there and we need to turn that around quickly."
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