Samuel Eto'o hasn't played for Chelsea since injuring his hamstring last month against Arsenal, but he may start on Tuesday against Paris Saint-Germain in the second leg of their Champions League tie.
Fernando Torres didn't seize his opportunity over the weekend against Stoke City.
"If we don't score a minimum of two goals, we are out. We know that," said José Mourinho. "If we can have everybody available who can give us a chance to score goals then let's do that. So maybe I will pick him [Eto'o] but to risk a player you need to have minimum conditions. If you think he's going to be out after 10 minutes of the game you can't take that risk. But if there is a minimum of conditions of risk, then, yes, I will pick him."