Cape Town - Liverpool boss Jurgen Klopp is unsure as to the extent of the injury sustained by James Milner in the 4-0 defeat of Barcelona at Wembley on Saturday.
The match marked the first time the Merseysiders were facing Luis Suarez since his departure to Catalonia, but it was new Reds signing Sadio Mane who stole the headlines with his first goal for Klopp's new-look side, scoring along with Divock Origi, Marko Grujic and Javier Mascherano, who under pressure from Jordan Henderson, netted an own-goal.
Milner though, who started at left-back for the English giants, was replaced by Alberto Moreno in the 42nd minute after pulling up.
Klopp revealed that he is waiting on the results of a scan on the 30-year-old midfielder.
"Milly [Milner], it doesn't look too good. We have no real idea what it is but it's something with the heel and we have to do a scan and then we'll know more," he told the club's official website.
Daniel Sturridge had already been ruled out of the clash on Friday, with a hip injury making him a doubt for next weekend's Premier League opener with Arsenal.
Meanwhile, out-of-favour winger Lazar Markovic may just be doing enough in pre-season to convince Klopp to included him in the squad for the coming campaign.
The 22-year-old, who was signed from Benfica in 2014, spent last term on loan at Fenerbahce, but a hamstring injury limited his game-time in Turkey.
Speaking about the young Serbian, Klopp said: "Everyone knows that Lazar is a very quick player but he was not at 100 percent (in pre-season training) and there was some doubt as to how it would be.
"Since then he became better and better and he is in much better shape. He's a good boy and works hard. At the end we will have to see how we will build our squad.
"We have time until August 31 or maybe something will happen earlier, or something will happen on the 31st or something will never happen.
"There is no final decision in this moment. We need all these players for the games and our training sessions and he is part of it