Fulham manager Roy Hodgson says that Damien Duff could be out injured for a week or two.
An Achilles strain forced Duff to come off in Fulham's win over Liverpool.
Hodgson said that Duff would play no part in Thursday's Europa League game in Rome.
"It's an injury he has been struggling with for a while," he said.
"It stems from his Achilles, although it's a little bit more complicated than that.
"There is no way I would even consider him for Roma. I will ask the medical staff to take as long as they need to try to get him back into shape as quickly as they can.
"And if he's fit for next Sunday then there's no reason why he shouldn't play for the Republic."
The Republic of Ireland face a World Cup play-off against France on 14 and 18 November.
"It is very hard stopping Damien playing for the Republic of Ireland. You have to lock him in a cage," added the Fulham boss.
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