Liverpool goalkeeper Alexander Doni suffered a dislocated finger in Tuesday's friendly defeat to Rangers.
The 31-year-old summer signing from Roma was making a rare appearance for Kenny Dalglish's team in the Ibrox fixture.
Doni was also one of Liverpool's standout performers on a forgettable night for the Reds, but he had to be substituted after sustaining his injury when saving a Kyle Lafferty shot in the second half.
Dalglish confirmed the nature of the problem after the match and was unsure how long his back-up option to first-choice goalkeeper Jose Reina would be facing on the sidelines.
"He's dislocated his finger, though it's been put back in," Liverpool's manager told his club's official website.
"I don't know how long that takes to recover from, but it was good for him, aside from the injury, because he made a couple of decent saves. It was good for him to get a game."
Lee McCulloch's goal condemned Liverpool to defeat ahead of the Premier League club's match against Norwich on Saturday evening.
But Dalglish took some positives from the Rangers game, as Glen Johnson, Daniel Agger and Fabio Aurelio all returned to action after injury.
"It was worthwhile in some aspects," said the Scot. "We've got some boys who haven't played for a while, like Glen Johnson.
"He got injured before the end of last season, went with England, came back and has never really been fully fit since. For him to get an hour was important.
"For Daniel Agger to get some time after injuring his rib and the same for Fabio Aurelio - it's a useful exercise for some of the boys."