Torres said: "It's a really important week for us, for this amazing game in Europe and we are going game to game.
"We are very focused on tomorrow. We know the difficulty of the game and we need to start well in the first leg with our supporters. We are really focused on tomorrow, we know it will be difficult and we know we need to get a good result to go to France with opportunities.
"We have a really good team. We need to recover some injured players so we need everybody this month. We are waiting for them and only want to think about Lille and then the weekend."
On manager Unai Emery's rotations, he added: "The most important thing is the team, to get the result, so he is the boss. I want to play but it's normal and I try to accept.
"I was injured for a month and a half but now I am starting to feel better and hopefully from now until the end of the season I will be fit."