Fulham midfielder Damien Duff is likely to be out for the rest of the season with a knee injury.
The 35-year-old has been struggling with the problem for a number of weeks and may require surgery.
He has not featured since the Whites were knocked out of the FA Cup by Sheffield United on 4 February.
Manager Felix Magath said: “Damien’s injury is worse. We have to expect that he will not play any more this season.
“The problem is his knee – an injury from three weeks ago which he had before I arrived here – and maybe he needs an operation.”
Fulham are weighing up a new deal for veteran winger Damien Duff.
The 34-year-old Irishman has clocked up more than 150 appearances for the Whites since his move from Newcastle United in 2009.
Duff only signed a 12-month extension back in February to tie him to Craven Cottage until next summer.
But boss Martin Jol believes the former Blackburn and Chelsea man could play on beyond the end of the campaign, providing he stays fit.
He said: “A few years ago they told me he was quite old – he was 33 – and he’s still playing, so I don’t know [how long he can go on for].
“It was the same with Danny Murphy. Every year they gave him another year, but he was 35 and still one of our best players.
“He’s a true professional. What we will do for him is give him an extension if we feel he can play for another year.”
Fulham expect to have winger Damien Duff back from a thigh injury for Saturday’s trip to Everton.
Steve Sidwell begins the first of a four-match ban following his red card against Arsenal last weekend, while fellow midfielder Emmanuel Frimpong will be available having missed out against his parent club.
Defender Sascha Riether (ankle) is doubtful. Midfielders Mahamadou Diarra (knee), Ashkan Dejagah (ankle) and Simon Davies (hip) are sidelined.
Fulham manager Martin Jol has confirmed that Damien Duff will miss the west London derby against Chelsea on Wednesday and is unlikely to return for Saturday’s clash with Arsenal.
Duff, who has a groin problem, was withdrawn in the 11th minute of the weekend draw at Aston Villa.
Jol said: “Damien is a bit better but he won’t be available against Chelsea and I don’t think he will be available against Arsenal either.”
Meanwhile, winger Ashkan Dejagah has had successful surgery on an ankle ligament injury but will not play again this season.
And on-loan Ajax midfielder Eyong Enoh has shaken off an ankle knock.
Damien Duff has revealed his delight at agreeing a contract extension with Fulham that will see him stay at Craven Cottage until the summer of 2014.
The former Irish international, who moved back into the Premier League after joining Fulham from Newcastle in August 2009, has signed a one-year contract extension after enjoying an impressive campaign under Martin Jol. The 33 year-old, who had to fight for his first-team place under the new manager, has scored three goals and made eight more this season and is ready to try and help Fulham to finish in the top ten.
Duff, who could make his hundredth Premier League appearance for Fulham against Stoke City tomorrow afternoon, told of his delight at extending his stay at the Cottage:
I’ve loved my time at Fulham since joining the club more than three years ago, so I’m really happy that I’m going to stay here for a further year. With twelve games remaining this season, a top ten finish is still possible and would represent another good season for the club as we aim to play in the Barclays Premier League for a 13th consecutive campaign.
I will always give 100 per cent for the chairman and the club, and I look forward to another season playing at Craven Cottage, which really is a special ground.