Striker Tomas Cvancara insists Celtic's Europa League dream is "not over" despite needing to overcome a three-goal deficit to have any hopes of progressing to the last 16.
Celtic are in Germany for tonight's second leg against Stuttgart after being skelped 4-1 at home last week.
Despite a massive game against Rangers at Ibrox to come on Sunday, Cvancara insists Celtic are not treating tonight's game as a dead rubber.
The Czech, who is on loan from Bundesliga club Borussia Monchengladbach, said: "It's still not over.
"We are still in the European competition and we have to do everything possible on the pitch to keep going.
"We know that it will be a difficult game, they already showed their quality in our stadium.
"We are focused on this game and we have to go for it.
"We have conceded some goals too easily but I would say that we have a lot of quality in the team.
"For us, we just have to focus on ourselves now and keep going."