Duff hobbled off at half-time during the Barclays Premier League defeat with a leg muscle injury.
The Republic of Ireland winger has been an integral part of the Cottagers’ European campaign, which has seen them brush aside the likes of Juventus, Shakhtar Donetsk and Wolfsburg to reach Wednesday’s final in Hamburg.
He did emerge after the final whistle to take part in a lap of appreciation for the Fulham fans following the club’s last home game of the season.
He will now be monitored by the club’s medical staff, who are already working overtime to make sure that top goalscorer Bobby Zamora is fit for Wednesday’s final.
“Duff was taken off at half-time because he took a kick a while ago and we think one of his muscles was cramping up,” said Hodgson.
“We hope it’s not too serious.
“I hope he’ll be fit for the final. There’s a week to go now. The medical staff don’t think it’s a muscle tear or anything like that.
“They think that it’s something to do with a kick he took a while ago which is switching off the muscle.”