Naby Keita was taken to hospital on Wednesday night after complaining of severe pain in his back following Liverpool’s Champions League defeat by Napoli.
Keita, the Guinea midfielder, left the field on a stretcher in the 20th minute having received lengthy treatment after an initial coming together with Lorenzo Insigne, who scored Napoli’s goal.
Jurgen Klopp, Liverpool’s manager, would not give a specific update on Keita when he was asked about him in his post-match press conference but it has now emerged that, as a precaution, he has been taken to hospital.
He told club doctor Andy Massey after he has been assessed that the ache in his back was significant.
Liverpool stayed over in Naples – this was always their intention – and are due to fly back to Merseyside at lunchtime on Thursday.
There is no indication at this stage whether Keita, who was replaced by Liverpool captain Jordan Henderson, will be available to face Manchester City on Sunday.
Liverpool said in a statement on their website: ‘Keita was transferred to a local hospital with the club doctor, where – with the midfielder’s agreement – he underwent a number of precautionary health checks to assess his condition.
‘No decision has yet been taken on when the 23-year-old will be discharged.’