The Reds centre-back limped off 22 minutes into the International Champions Cup clash in Charlotte
Liverpool boss Jurgen Klopp vented his frustration after defender Joel Matip limped out of a pre-season friendly against Borussia Dortmund with a fresh injury problem.
The German chief said it ‘was not cool’ to see the centre-back come off just 22 minutes into the International Champions Cup clash in Charlotte, USA.
Liverpool lost the game, with Klopp’s former team coming from a goal behind to win 3-1.
Goalkeeper Lorius Karius was also guilty of another mistake in the Reds’ net, but Klopp said Matip’s injury blow was “the most negative thing about the day”.
The Cameroon international has only just returned to action after his 2017/18 season was cut short by a thigh injury which required surgery.
Klopp played down concerns the issue was a recurrence of the previous problem, saying it was a “little tear”, and the player will be monitored over the next few days.
“It’s not the same injury. It’s another muscle – it looks like, hopefully, only a little tear,” the manager said at his post-match press conference, quoted on the club’s website.
“We will see, but we cannot say any more about it now. It is of course the most negative thing about the day. It’s not cool. Things like this can happen, but you don’t want them to.
“Maybe on Monday or Tuesday we will know more, but in this moment we only know that it was too painful for him to carry on.”
Matip’s last appearance of 2017/18 came in March, with the Cameroon centre-back sustaining a thigh injury against Crystal Palace in the Premier League and subsequently going under the knife.
He made his return to action in Liverpool’s 0-0 friendly against Bury on July 14 and then started in the 2-0 win over Blackburn.
Liverpool took the lead against Borussia Dortmund through a fine Virgil van Dijk header from Andrew Robertson’s cross.
But Dortmund stormed back with American starlet Christian Pulisic – previously linked with a move to Anfield – scoring twice.
The 19-year-old first converted a penalty after being fouled by James Milner and then fired into the bottom-left corner from the edge of the box in the 89th minute.
Karius was then at the centre of attention against as the Bundesliga side snatched a third goal three minutes into stoppage time, Jacob Bruun Larsen tapping home after the German goalkeeper parried a Pulisic’s shot right into his path.