Chelsea interim manager Guus Hiddink says striker Diego Costa will undergo a late fitness test ahead of tonight's game against Paris Saint-Germain.
The Blues will host the French giants at Stamford Bridge after suffering a 2-1 defeat in France last month.
Attacking midfielders Pedro and Eden Hazard are both fit and in the squad to face Laurent Blanc's men.
"Diego Costa had a little problem at the weekend which is why he did not play but he was in training today so we will see for [today's] game," Hiddink said.
"Pedro had a setback recently but he has been working hard and he has had some full training sessions and had a good session today, so he is back in the squad for tomorrow.
"Diego has scored recently in not the worst league in the world.
"He is frequently scoring since December. Before that it was he and the team that had a problem not scoring so let's hope and see if he can make it on the European level as well.
"Eden [Hazard] at the time when we were playing away in Paris was just coming back from a rather severe injury and we could not ask him to be top game-fit.
"We are now some weeks further on and he can and must show tomorrow what he is capable of, which is more than in the away game, but the reason for his substitution was to not go into a danger zone due to his recent comeback from his injury. We think he can deliver now at full fitness.
"It is always good to have an away goal in a European game.
"That doesn't make it easy of course but it is a game between two big teams in European football. It will be a clash between two adventurous sides that hopefully Europe will enjoy."