Liverpool attacker Roberto Firmino was missing from training ahead of the UEFA Champions League clash with Bayern Munich after suffering with a virus.
The Independent reported the forward's absence as the Reds prepare for Tuesday's match. James Pearce of the Liverpool Echo added Liverpool "remain hopeful" Firmino will play, but he noted Daniel Sturridge is "on standby" if the Brazilian is unavailable.
Firmino would be a big loss for manager Jurgen Klopp as he is a key player in the German's squad.
Sturridge would be a useful back-up, but he is unreliable from a fitness point of view and has not enjoyed a long spell in the starting XI for a long time.