Their fans saw a dramatic game in the Europa League against Serie A side Inter Milan last week and know they have their work cut out for them ahead of the second leg – but are fully behind their team and are desperate to do anything they can to help their side progress.
It may be a long shot but there is always a chance when it comes to cup competitions in football and with a fair few trophies still up for grabs, we have taken a look at five things the fans should be talking about when it comes to their club.
Click on manager Ronny Deila to see what we think the fans should be asking this week.
Celtic fans. What are you talking about this week? Let us know your thoughts below, become a guest blogger or tweet us @LaFootyettes.