Celtic captain Scott Brown has said that he expects Aiden McGeady to receive a warm welcome from the club's supporters when the winger returns to Parkhead with Spartak Moscow on Wednesday evening.
McGeady, 26, came through the ranks at Celtic, making 251 first-team appearances before leaving to join the Russian side in 2010 for a fee in the region of £10m.
"I think Aiden will get a good reception," said Brown. "He did really well when he was here. He was a joy to play alongside and he was a fans' favourite as well so I am sure they will give him that good reception at the start.
"But once the game starts, we are there to win it and so is he. It will be heated, fast and an exciting game to watch.
"I think we all know Aiden is a huge danger. He is a very talented boy, he is going to be a threat. He is enjoyable to watch and creates all sorts of problems for the defence and midfield so he is going to be one to watch."
Celtic will reach the knockout stages of the Champions League if they can better Benfica's result against Barcelona.