Celtic manager Neil Lennon has said that he is wary of the threat posed by Atletico Madrid ahead of their Europa League group stage game.
The Bhoys travel to the Spanish capital for their tie on Thursday, and Lennon says it will be a challenge for his side.
"They won this competition not too long ago (2010) so their pedigree is up there with any of the clubs in Europe," he said.
"We know it's going to be a huge game, it's going to be a big jump in quality from what we are used to in the SPL but these are the games we want to play in and it's a great challenge for us all.
"If you look at the teams that are in the group, it is a fantastic group and all we are looking for from the players is to do themselves justice."
The SPL side are joined by Italian club Udinese and French team Rennes in Group I.
