Nemanja Vidic is determined Manchester United will not lose their focus ahead of on Tuesday night's battle of Britain showdown with Celtic.
Although Vidic has experienced the intensity of derby games in Moscow and his native Belgrade, the two meetings against Gordon Strachan's side in 2006 provided him with the best atmosphere he has ever known.
It promises to be the same again this evening as Celtic look to improve their own diabolical away record in the competition and breathe fresh life into their qualification hopes.
Vidic knows United have the class to repel that challenge. But he has warned his team-mates not to let the noise divert their attention from the need to claim a home win.
"The champion team of Scotland will be desperate to beat the champions of England," he said.
"The atmospheres I experienced two years ago were the best I have known in my career and there will be more tension in the ground.
"But it is not good for the players to be too passionate. We need to be focused.
"If we put too much aggression into it or pay too much attention to the crowd, we could find it difficult. We need to stay calm and concentrate."
Sir Alex Ferguson is pondering a surprise decision to leave out Cristiano Ronaldo as, after consultation with former assistant and current Portugal national coach Carlos Queiroz, he believes the winger is struggling to complete two games in a week.
"Carlos feels Cristiano is still finding it hard to recover from a Saturday game to a Wednesday," said Ferguson.
"I need to look at this game and the fact it is on a Tuesday and assess whether to bring in Nani."
Definitely out is Patrice Evra, who suffered a hamstring injury against West Brom on Saturday and will not be risked, so John O'Shea will fill the left-back role.
After five successive wins, including a comfortable triumph over Aalborg in their last Champions League match, United are hitting the form Ferguson demands and are hefty favourites to overcome a Celtic side missing Jan Venegoor of Hesselink and Giorgios Samaras.
In contrast, the hosts have an embarrassment of riches up front, with Ferguson admitting he faces a major selection dilemma as Carlos Tevez hopes to split Wayne Rooney's superb partnership with Dimitar Berbatov.
"My torment," he said, when asked what he was going to do.
"It is very difficult trying to gauge whether I can play the three of them together.
"I have been thinking about it for a couple of weeks now. It is possible, with one of them playing in behind.
"It is a very difficult situation because they are all terrific players."