Liverpool defender Jamie Carragher hopes former team-mate Danny Murphy does not inflict severe damage to the Reds' Premier League title tilt.
Fulham captain Murphy left Anfield in 2004 and moved to Craven Cottage three years later after spells at Charlton and Tottenham.
The midfielder boosted Liverpool's hopes of league silverware when scoring from the penalty spot against Manchester United in a 2-0 home victory for Fulham at the end of March.
And Carragher is desperate not to be on the receiving end of similar treatment when Liverpool - who could overtake United in top spot with a draw - arrive at Craven Cottage on Saturday.
"Danny has probably been Fulham's best player this season along with Brede Hangeland at the back," the central defender told the Reds' official website.
"I think with Danny being captain and playing more of a holding role now, he's organising the people around him.
"He's got great experience, so we know it will be difficult, but it's up to us to try and pin him down and stop him playing because I think he makes Fulham tick."
Having been held to a goalless stalemate on Merseyside last November, Carragher is also well aware of the threat posed by Fulham.
Earlier in the season Chelsea and Arsenal joined United in failing to record victories on the banks of the Thames, and Carragher believes that is a reason for concern.
"Chelsea only drew at Craven Cottage, they defeated Arsenal there earlier on in the season and we couldn't beat them at Anfield," he added.
"So we're talking about a very tough game for us, but we've got to make sure we're not another big team to drop points there."