Manchester United strolled into the Capital One Cup last eight as Javier Hernandez's double helped end Norwich's hopes of an Old Trafford upset.
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The Mexican converted from the spot after Adnan Januzaj had been brought down by Leroy Fer before nodding in after the break.
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Phil Jones rifled home a volley before Fabio crowned the win with a precise finish from Wayne Rooney's lofted pass.
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Johan Elmander poked wide from a good, but rare, chance for the visitors.
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An apparently serious injury to Robert Snodgrass, who was carried off after a clash of heads, added to Norwich's disappointment.
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The victory extended United's unbeaten run to six games and, despite some indifferent performances during that time, there does seem to be some momentum building after a stuttering start to manager David Moyes's reign.
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Moyes will have been particularly pleased by Hernandez and Belgian teenager Januzaj, who carried the vast majority of the hosts' attacking threat, staking convincing claims to more regular first-team action.
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In the opposing dug-out, Chris Hughton was left to contemplate a toothless display as his struggling Norwich side rarely caused Manchester United any discomfort. They have taken a draw and three defeats from four games in October.
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Manchester United's £15m winger Wilfried Zaha made his first appearance since August's 2-0 Community Shield win over Wigan - as both sides fielded much-changed starting line-ups and took time to settle.
Hernandez has done very well for Manchester United cos he's been scoring some important goals