Thiago Alcantara and Alisson are battling to be fit for Liverpool's clash with Arsenal on Monday night.
The Mirror says the duo missed training at Melwood this week and are a doubt for Monday night.
Alisson and Thiago are set to undergo fitness tests on the morning of the match before Jurgen Klopp will make a decision on whether they can feature.
It is not yet known what is wrong with either individual.
Thiago was set to make his Anfield debut against Arsenal after he came off the bench in Liverpool's 2-0 win over Chelsea at Stamford Bridge last week.