Liverpool have confirmed that central defender Martin Skrtel suffered a broken metatarsal in the 3-1 Europa League victory over Unirea Urziceni on Thursday evening.
The Slovakia international had to be substituted in the 66th minute as the Reds came from behind to win the second leg of the last 32 clash, sealing a 4-1 aggregate success following last week's 1-0 victory at Anfield.
Boss Rafa Benitez told the club's official website: "We were really disappointed after the game because it was a good result, but then we had the bad news about Martin.
"He's had x-rays today and they confirmed he has a broken metatarsal.
"We have to check over the next couple of days how long it will take to recover."
Skrtel, 25, moved to Anfield in January 2008 from Zenit St Petersburg and has since racked up 79 appearances in all competitions, scoring once in a 2-2 draw with Manchester City earlier this season.