Hermann Hreidarsson is confident Portsmouth are capable of pulling off a shock against Manchester United in their FA Cup quarter-final clash.The 33-year-old, who joined Pompey from Charlton in the summer, is confident of ending United's treble dreams at Old Trafford.

He told the club's official website: "We're in the last eight and we're not just there to make up the numbers.

"They're full of world-class players in every position and we know we will have to play really well to get through."

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