Jurgen Klopp confirmed Liverpool are waiting to discover the extent of injuries suffered by Virgil van Dijk and Thiago Alcantara in the 2-2 draw against Everton on Saturday.
Van Dijk was substituted after Everton goalkeeper Jordan Pickford raced out of his goal and clattered the Netherlands centre-back knee-high in the eighth minute.
Thiago, meanwhile, played the full 90 minutes but Klopp revealed the Spain international was in discomfort after the game following a late challenge on the midfielder by Richarlison, which led to the Brazilian being sent off in the 90th minute.
"When I left the pitch, Thiago told me in the red card situation with Richarlison he thinks he got injured," Klopp said in his post-match press conference, with both players sent for scans on their injuries.
"We will see if it's true or not, but if he felt like this then we need to have a look."
When asked about the severity of Van Dijk's injury, Klopp added: "It's not good. Virgil played so many games in a row, but he couldn't play on, so it is not good."
Pickford was saved from conceding a penalty - and possibly being shown a red card - by a marginal VAR decision which ruled Van Dijk's shoulder was offside, with Liverpool leading at the time of through Sadio Mane's third-minute strike.