Chelsea manager Guus Hiddink admits he is unsure whether Diego Costa will be available for Saturday's FA Cup quarter-final clash against Everton at Goodison Park.
The Blues striker was substituted off during their midweek Champions League defeat to Paris Saint-Germain, a pivotal moment in the tie with the fiery forward was looking dangerous.
He said: "He went off against PSG and had a little bit more of a problem.
"I cannot say yes or no at this. It is in his hip as well as his hamstring.”
The Spaniard has enjoyed a renaissance since Hiddink's arrival at the club, scoring 11 of his 15 goals for the season under the former Netherlands manager.
The same cannot be said for fellow Blues player Eden Hazard, who also endured a poor start to the season under former boss Jose Mourinho.
Hazard was also substituted in the defeat to PSG , but will be travel for tomorrow's clash - as will captain John Terry, who will provide the Blues with a massive boost ahead of their quarter-final tie.
Hiddink added: "Terry worked rather well the past days and he will be included in the list for tomorrow.
"Of course he has not practised a lot in recent weeks, but it was intensified the past two days, and today we will see if he has a reaction.
"Anyway, I would like him to travel to Liverpool.
"Hazard will be ok and available, he said so himself. Every now and then we speak. He is desperate to participate in the team performance."