Chelsea defender Gary Cahill expects a hostile atmosphere at Champions League opponents PSG.
Cahill could start for Chelsea against PSG star Zlatan Ibrahimovic.
He said: "You need to try to keep your focus, try to be mentally strong on what you're doing. Sometimes its difficult, especially in the first 15 or 20 minutes because the noise level is unbelievable at times."
Cahill added: "I think everyone on the big occasions is quite nervous, and that's a good thing to be, when you hear the noise levels, you kind of look over and that added bit of nerves in the away team coming out to you, its a good felling to have that."
