Second choice Caballero started in Saturday’s 4-0 win over Bournemouth, but does not know yet if he is facing the Ligue 1 giants.
He said: “I haven’t spoken to the manager about Paris, as we don’t know about Joe’s recovery.
“I just tried to enjoy the game against Bournemouth and hopefully if I get the opportunity it will be a big chance for me to play in Paris.
“It won’t be easy whoever plays. Paris are a big team, already the French champions, with some massive players.
“But we must be ready because this is what happens in the quarter-finals of the Champions League – you are sure to face a big club with amazing players.”