Captain Neil Lennon insists Celtic are ready for whatever challenge lies ahead in the knock-out stages of the Champions League.
The 1-0 win over Manchester United at Parkhead on Tuesday night, courtesy of a wonderful Shunsuke Nakamura free-kick nine minutes from time, guaranteed Gordon Strachan's side a place in the last 16 for the first time.
The Scottish giants travel to Denmark in a fortnight to take on FC Copenhagen knowing their qualification is already assured.
The tournament continues into the new year and Celtic will join the likes of Real Madrid, Valencia, Liverpool, Chelsea and Bayern Munich in next month's draw.
Lennon said: 'To say that I am delighted we have finally got through is an understatement. I didn't want it hanging over my head that we had failed again (in the group stages) and this might never happen again.
'Anything can happen in the last 16. We will just wait for the draw and see where it takes us. But it has been a long time coming.
'We will just enjoy this game then focus on the Copenhagen match when it comes around in a fortnight.'
Lennon acknowledged the Old Trafford side's superiority in terms of possession, especially in the first half when they enjoyed almost total domination.
It was only when Strachan replaced Evander Sno and Maciej Zurawski with Shaun Maloney and Jiri Jarosik at the interval that the home side came into the match.
Lennon admitted: 'I was angry with the way we were passing the ball in the first half. We were playing little square passes which put players in trouble and that is not like us at all.
'We knew they would have a lot of possession. The pleasing thing was the only time they got into the box in the first half was when Cristiano Ronaldo got through and that came from a mistake by us.
'But we made the changes and that made a big difference.'
Lennon is hoping Celtic's progress in Europe will persuade Maloney to extend his contract which runs out at the end of the season.
Representatives of the 23-year-old have halted talks with Celtic chief executive Peter Lawwell, and Maloney will be free to talk to interested clubs when the January transfer window opens.
But Lennon is hoping an agreement between club and player can be reached before then.
He said: 'Maybe this win will help Shaun to stay. He wants to stay and I hope that he does. It is up to him, his representatives and the club to get together and sort it out.'
