Inter Milan defender Nemanja Vidic admits he's warned teammates about the atmosphere at Celtic Park.
Inter meet Celtic in the Europa League this week.
"The atmosphere that's created at that stadium is intimidating," said former Manchester United captain Vidic.
"I have already told my teammates to ignore the noise created by their fans. If we allow it to enter our minds we can lose focus and we cannot afford that against a team of this quality, especially when playing at home.
"In the course of my career I've played in very difficult places and among the best ones are the fans of Celtic Park. We have to be professional and block from our ears their noise."
