Alexander Isak is set to undergo a scan to determine the extent of the injury he suffered in Liverpool’s 2-1 win over Tottenham Hotspur.
Isak, 26, made a significant impact off the bench as he broke the deadlock just 11 minutes after being brought on at the start of the second half.
However, the £125million summer signing was unable to celebrate his second Premier League goal for the club after being caught by a sliding challenge from defender Micky van de Ven.
Isak had to be helped from the field by medical staff with head coach Arne Slot admitting they face an anxious wait to discover how long he will be sidelined with a suspected lower leg injury.
“I don’t have any news on him but if a player scores, gets injured and doesn’t come back on the pitch or doesn’t try to come back, it’s usually not a good thing,” Slot said. “I cannot say anything more than that. That is just a gut feeling and nothing more than that. Nothing medical to say about it.
“I haven’t spoken to him about it yet but it’s a good thing he scored — a good goal assisted by Florian Wirtz.
“Let’s not be too negative yet. We don’t know yet. Let’s hope Alex is back with us soon but it is difficult to say.”
Victory came at a cost with right-back Conor Bradley taken off at half-time after being hurt in a collision with Djed Spence during the opening 45 minutes.
Florian Wirtz limped off late on but Liverpool are hopeful the Germany international was only suffering from cramp.
Dominik Szoboszlai collected a fifth yellow card of the season which means he will be suspended for the visit of Wolverhampton Wanderers to Anfield on December 27.
Having come off the bench to replace Isak as he made his comeback from injury after two months out, Jeremie Frimpong was subsequently subbed off in stoppage time.
Slot explained that was a tactical switch with Federico Chiesa introduced as Liverpool clung on to win against nine men following red cards for Xavi Simons and Cristian Romero.
“With Jeremie there is no problem at all,” Slot added. “I didn’t want to go down to 10 men for 30 seconds. This is the only country where players have to go off for 30 seconds if they’re injured. I adapted to that.
“I knew there wasn’t long to play and thought we struggled a lot. Playing 10 v 10 for half a minute with him being on the floor, I just went with Federico so no problem with him.
“With Alex and Conor, we have to wait. You could see our bench today but we are not the only team in this period picking up injuries because we play so many games.”
Liverpool appeared comfortable when Hugo Ekitike headed them 2-0 up but after Richarlison pulled one back in the 83rd minute panic set in. Even after Romero’s red card in stoppage time, the visitors failed to control proceedings and endured a nervy finale.
Slot said: “It wasn’t perfect, especially the last 10 minutes, but we pick up points and are developing in a way I want to see.
”I thought against nine men we would be able to keep them away from our goal but it looked as though we were down to nine and they had 11, which led to attack, after attack, after attack.“