Jordi Alba has been named in the Barcelona squad to face Real Madrid, but head coach Quique Setien is unsure what part the full-back will play in Sunday's Clasico.
Alba injured his right adductor against Getafe on February 15, with Junior Firpo subsequently filling in at left-back against Eibar and Napoli.
However, Alba was on Saturday included in Setien's 18-man selection for the trip to the Santiago Bernabeu.
Setien told a news conference: "The fact is he's very well at the moment, a positive sensation. Clearly you have seen I've put him in the squad.
"The question now is whether he will start the game or not. We're not sure. It depends how he's feeling tomorrow, if he's feeling the same as today.
"He's got another day, but he's looking confident. Let's see whether we play him to start with or not. I haven't decided yet."
Barca boss Setien kept his cards close to his chest, but revealed Alba was not the only player he would be making a late call on, adding: "No, I've got others."
However, Barca should also be boosted by the presence of Gerard Pique in the centre of defence, with the former Manchester United man fit despite suffering an ankle knock against Napoli in midweek.
"I think he's pretty much over the problem he had," Setien said. "There's no major damage. He's over the problem."