The 24-year-old featured for the entire 120 minutes of Liverpool's FA Cup quarter-final defeat against their arch-rivals over the weekend at Old Trafford.
It is understood that Nunez reported feeling discomfort in his hamstring to Uruguay boss Marcelo Bielsa following the match, and it was decided that he would remain with the club's medical staff over the international break.
As a result, Nunez will not travel with La Celeste for the upcoming friendlies against the Basque Country and the Ivory Coast.
However, it is believed that the injury is not considered to be too serious, and with nearly two weeks until Liverpool's next match, he remains in contention to feature for the club against Brighton & Hove Albion at Anfield on March 31.
Following Sunday's match, Klopp acknowledged that Nunez was among several players dealing with injuries in a squad already affected by fitness issues, stating, «Now, the boys go on international duty, they have to recover. We hope they come back healthy.»
«We had some problems. Lucho (Luis Diaz) felt his groin, Darwin his hamstring, hopefully it is not. And Cody Gakpo has twisted his ankle I think. I didn't see it back, so we have to see.
»I don't know when they play their first game but probably in four or five days, it's a crazy schedule. Let's hope they can get through that and then the rest of the season starts."
Liverpool are currently dealing with the absence of eight key first-team players, including Alisson, Joel Matip, Trent Alexander-Arnold, Curtis Jones, Diogo Jota, Thiago Alcantara, Stefan Bajcetic and Ben Doak.
However,
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