Celtic keeper Artur Boruc admits the Hoops will go no further in the Champions League if they play as badly again as they did in their comprehensive 3-1 defeat by FC Copenhagen in the Parken Stadium last night.
Gordon Strachan's men had the chance to guarantee top spot in Group F by beating the Danes but a goal by Atiba Hutchinson after only 90 seconds set the tone for a miserable 90 minutes which ended with the Parkhead outfit still looking for their first away win the competition.
Further strikes by Jesper Gronkjaer and Marcus Allback put the home side into a comfortable lead before Jiri Jarosik scored a late consolation for the visitors who nevertheless will go through to the last-16 draw as runners-up to Manchester United.
But the Polish keeper, who has conceded three goals in each of the three away games in the section, said:
'If we repeat this performance we're not going to do anything.
'If we concede three goals in every game we're not going to go through.
'But we can't look on this as the end of the world, we still have a huge game to look forward to.
'We have to work on the errors and be ready for the last 16.'
Striker Kenny Miller, who missed two great first half chances when the visitors were only a goal behind, tried to look on the positive side and said:
'The goals we lost were bad but we're in the last 16.
'We can't afford to be scared of anyone. We know we'll face a massive club but we'll take anyone.'
Strachan looked almost struck by disbelief after his side's inept performance and vowed to rectify the problems the Hoops have when they travel in Europe.
He said: 'I know the problems and rest assured I will sort them out.
'I don't know if it will be in the next three months or the next season but I will sort them out.
'It's a challenge for me but I will do it.'
The Parkhead boss admitted the dressing room was quiet after the game despite the fact that they had qualified through to the knockout stages and are on course to retain their Bank of Scotland Premier League title.
He said: 'Nothing can give us a lift at the moment and the disappointment overwhelms me.
'We are down. We should have been celebrating with our fans because we are through to the last 16 but that defeat wiped it away.
'You might point out that we are 16 points ahead in the title race but that doesn't affect us at the moment because we are overwhelmed with disappointment.'