Fulham skipper Danny Murphy is wary of the threat Darren Bent poses this weekend at Craven Cottage after watching him cut his teeth at Charlton.
Bent had scored plenty of goals in the Championship with Ipswich before establishing himself at The Valley in the 2006 season, where Murphy was before leaving for Tottenham halfway through that campaign.
"If you switch off once with Darren, he'll kill you," Murphy said.
"He's a big factor in why Sunderland are where they are in the league.
"I've played with Darren and I'm a big fan of his because the one thing he always does is get goals. You might not see him for 80 minutes in a game but he'll keep running, he'll keep working hard to get his chances, and he'll put one away.
"Sunderland also play with that Steve Bruce tenacity that was evident at Birmingham and Wigan. They've got a great work ethic and I'm expecting a difficult game."
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