Uefa Champions League Venue: Celtic Park Date: Tuesday, 18 August Kick-off: 1945 BST Coverage: BBC Sport website, BBC Radio 5 live, BBC Radio Scotland and live on Sky
McGeady and Scott McDonald scored Celtic's goals at Pittodrie
Midfielder Aiden McGeady believes Celtic must knock Arsenal out of their stride on Tuesday if they are to win their Champions League qualifier.
Arsenal visit Glasgow for the first leg on a high after destroying Everton 6-1.
"We know we are the underdogs and they are obviously the favourites, but they are definitely beatable," said McGeady.
"A lot of teams in the Premier League beat them last season by getting in and around them and not letting them play and that's something we have to do."
McGeady scored a double in a 3-1 win away to Aberdeen as the Scottish Premier League kicked off on Saturday.
But Arsenal eclipsed that hours later as they began their Barclays Premier League campaign with a stunning victory at Goodison Park.
The manager said to Shaun and me before the game that he wants us to get to at least double figures this season
Celtic winger Aiden McGeady
"Arsenal are going to be a totally different team to Aberdeen," said McGeady. "It could be a tough 90 minutes."
McGeady was glad to get a start on team-mate Shaun Maloney in their race to reach double figures in the scoring stakes.
"We played very well in the first half, there was a lot of attacking football and it could have been five or six," said the Republic of Ireland midfielder.
"I think the gaffer was disappointed because, with Aberdeen getting the goal in the second half, it could have been a nervy finish.
"But, overall, it was a good day at the office. The manager said to Shaun and me before the game that he wants us to get to at least double figures this season and I totally agree with him.
"I definitely need to improve on my goal-scoring and today was great, but the main thing is we got off to a good start in the league."
Aberdeen manager Mark McGhee was suitably impressed with Celtic to offer them hope against Arsenal on Tuesday.
"I've watched a lot of Arsenal over the last five years or so and I think Celtic have as good a chance next week as they would have at any time during those five years," he said.
"Arsenal are a terrific footballing team, but Celtic, with their movement and play that they had today, are capable of giving them a real game."
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