Scott McDonald earned Middlesbrough a quarter-final place in a hard-fought Capital One Cup fourth round Wear-Tees derby at the Stadium of Light.
The striker, who was handed a start by Boro boss Tony Mowbray after he scored both of the goals in last weekend's 2-1 npower Championship win over Bolton from the bench, scrambled the ball home from six yards at the near post late in the first half.
It was enough for Middlesbrough to progress as Sunderland lacked the cutting edge that has seen them draw six of their eight Barclays Premier League games so far this season.
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