Celtic are back in the Champions League after Legia Warsaw were punished for fielding an ineligible player. Legia won the third qualifying round tie 6-1 on aggregate but brought on Bartosz Bereszynski in the second leg, while he was supposed to be suspended.
"It is very strange, I have to say that," said Celtic boss Ronny Deila, whose Norwegian countryman Henning Berg is in charge of Legia.
"First of all I feel very sorry for Legia, and my friends from Norway there. It is tough to think of that and now we are in the Champions League.
"Legia played well against us, they put in good performances but this is nothing to do with Celtic. It is about UEFA.
"It is not my business. It is a club thing and a UEFA thing.
"It is a tough decision and I really feel sorry for Legia but we have to go into the game and prepare for Maribor.
"The players want to play in the Champions League. It looks like we have been given another chance and I think it will be no problem to get the players up for the game."
Legia have five days to appeal and have asked for Uefa's reasoning.
