Liverpool midfielder Thiago Silva is out of Monday's derby against Everton.
The Spain midfielder, 31, who has struggled with his fitness this campaign reportedly suffered a knock in training last week.
The Telegraph says the influential playmaker will be out for around a month - adding to Jurgen Klopp's injury woes.
The Reds have not had the best of luck in keeping their first team stars fit.
Key figures including Virgil Van Dijk, Luis Diaz, Diogo Jota, Ibrahim Konate and Roberto Firmino have all missed large chunks of the season.
Former Bayern Munich star Thiago had featured in all Liverpool's games post the World Cup break.
But, he will miss Monday's clash against Everton - giving boss Klopp a huge headache.
The German could turn to either Jordan Henderson or Fabinho to fill the void.