The Fir Park side follow Barcelona in making the trip to Parkhead, and do so sitting just three points behind the champions after winning four of their last five SPFL Premiership matches. Ainsworth has scored once and helped set up three goals in his four matches during that streak and is now intent on making his mark against Neil Lennon's men.
"It will be massive," said the Englishman, who signed on loan from Rotherham. "When I came up here, I didn't realise how big it was because down south they don't talk about it. I have had friends and a lot of English players I know come up here and they have enjoyed it, and to experience it myself is brilliant. I have enjoyed every minute: the training, the staff, the players, the press, everybody has been dead good to me. I want to be able to repay that with my football."
Of today's trip to Glasgow, the 26-year-old added: "We want to go and win the game, we don't want to go and sit back. What's the point? I have played at the Emirates against Arsenal when there was 30-40,000 and I played at St James' Park against Newcastle when it was full. I have played against big crowds and I will just go and enjoy the moment."
Manager Stuart McCall will likely be a little more cautious, despite beating Celtic in their two most recent meetings. "I think it is a different story this time," he said. "Even in European ties, I always think you have to try to take your chance at home. Going away, with the size of the park, you do think a bit differently, although not in a negative way."
His outlook is perhaps informed by Motherwell's recent record at Celtic Park. "Since I have been at the club, this is the only ground we have not got anything from," said McCall, who will give James McFadden a late fitness test. "We have had three 1-0 defeats and pushed them close so we go there with no fear. We are on a decent little run ourselves."