James Milner, Georginio Wijnaldum and Fabinho did not participate alongside their teammates in Liverpool’s first training session in Marbella as a precaution, Jürgen Klopp explained.
The trio were absent as the Reds undertook a workout in Spain on Tuesday morning.
However, Klopp explained Milner and Wijnaldum completed a separate session in the team hotel as they continue to work their way back to full fitness following illness.
Meanwhile, Fabinho was absent due a minor muscle complaint, but is expected to resume full training in the coming days.
The manager told Liverpoolfc.com: “It’s how it is after games, you have a couple of problems.
“Millie and Gini still struggle with their illnesses, so they did a bit of work in the hotel. Fabinho felt [something] a little bit; it will not be a problem, but there was no reason for him to be out today.
“Hopefully he can train tomorrow and if not then the day after that. None of them are serious, all will be fine.”