Celtic captain Stephen McManus has urged calm after their defeat at Shakhtar Donetsk this week.
He said: "On a personal level I know I made mistakes and I also understand I'll make a lot more before my career is finished. It was a disappointing result but one defeat doesn't cripple Celtic so far as the rest of the group is concerned.
"There's no-one in that dressing room feeling sorry for themselves. You dust yourself down and you move on.
"It's all right sitting in a stand and analysing a defeat like that, but out on the pitch we knew we were up against a side who had spent big money on strengthening their team during the summer, and it has to be kept in mind that Celtic are still a young side.
"But we have a strong bunch of lads and I can assure you we'll all be pulling in the same direction after a result like this one. There will be no panic button pressed."