Johnson had to be taken off during Thursday night's Europa League qualifier against Amkar Perm in the 66th minute after a hefty bodycheck by defender Dmitry Belorukov.

Roy Hodgson was seething with the challenge, for which the Russian was given a yellow card, and predicted that Johnson could be out for eight weeks with a dislocated shoulder.

The Fulham manager revealed, however, that the 28-year-old striker could be back in training in as little as two weeks, which could pave the way for a return to first team action within five weeks.

"The ligaments around the collar bone have snapped," the Fulham manager said.

"I don't think he will be doing any football training for at least two to three weeks and then it's just a question of trying to get him back as quickly as we can after that.

"It's not great news, but on the other hand it doesn't seem to make a difference with that type of injury whether the ligaments are snapped or if they are stretched or damaged in another way.

"He was quite hopeful this morning that he would be back before those eight weeks but of course he is going to be out for a period of time."

Fulham host Chelsea in Sunday's west London derby before embarking on the second leg against Amkar next Thursday and Hodgson said losing Johnson is a bitter blow.

The former Everton striker scored the first after just three minutes and linked superbly with Bobby Zamora, who set him up before firing his own way onto the scoresheet.

"The best part of our game by a long stretch was the ability of our front two to cause them so many problems," said Hodgson.

"They both scored and Bobby set up Andy's goal but now that partnership is broken up for the foreseeable future.

"We're looking to sign another front player so we'll consider bringing someone in, but that's not because Andy is injured but because we needed another front player anyway."

New signing Damien Duff, who arrived from Newcastle United on Tuesday, made his debut with 15 minutes to go and had an immediate impact as he helped set-up Zamora's goal.

"Damien is a quality player. He needs a bit of time to come to terms with everything we do as a team but his start couldn't have been better," said Hodgson.

"I'm sure the fans are happy with the signing and will be even happier now they have seen him."

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