Guernsey FC midfielder Dave Rihoy looks set to miss the rest of the season after damaging knee ligaments.
The 30-year-old, who was not part of Guernsey's Island Games gold-medal winning side, was hurt in the 2-1 loss to Peacehaven and Telscombe.
"It's early days for an injury like that, but I'd imagine it's going to be pretty long term," manager Tony Vance told BBC Radio Guernsey.
"If we get him back at any point during this season then that'll be a bonus."
Rihoy has been a stalwart of the island side for a decade, but seriously injured the same knee 18 months ago.
Vance will also have to do without striker Ross Allen when Guernsey travel to Sittingbourne in the Isthmian League Division One South.
Allen suffered a dead leg in the 2-1 FA Cup preliminary round replay loss to Phoenix Sports on Wednesday.
"I'm not sure when we'll see him again, only he'll know that," Vance said of the club's record goalscorer.
"At some point he'll come back into the frame, but for now we'll have to work with the players we've got."