Celtic begin their Europa League campaign against Salzburg in Austria this evening, with the game live on BT Sport at 6pm.
Ronny Deila's side also face Dinamo Zagreb and FC Astra - who meet in Croatia tonight - in Group D, with their first home fixture against Dinamo on Thursday October 2.
Salzburg lost to Malmo in the Champions League play-offs but beat Ajax 6-1 on aggregate in last season's Europa League before losing to Basel in the round of 16.
Deila told the Celtic website: "There will be a high intensity in the game. We know that they press very intensively high up the pitch and take a lot of risks.
“We need to have 100% focus, be very concentrated and be up for a fight - if we do that, we know we have quality in the team who can hurt them and cause them problems.”
Goalkeeper Craig Gordon added: "I think it’s fair to say we are getting the hardest game out of the way first. We have to be solid and we will have to defend very well. It will be a very difficult match but we’re here to get points on the board."
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