Anthony Stokes and Joe Ledley were on the mark in the 2-1 win in Paisley and Lennon hopes his side can build on that as they look to overturn a 3-0 first leg deficit against Juventus on Wednesday.
"We've gifted them a goal and they haven't had to work for the goal. Gary's clean through and Jamesy then snatched at the rebound but we're going well, still in three competitions.
"It is another semi-final to look forward to. I think that's five or six in a row now and obviously we want to improve on our record in the cups.
"It is a huge win and keeps the season very much alive and competitive.
"Joe Ledley has come back and been exceptional for us. We've had a marvellous season and, hopefully, we can keep it going on Wednesday (against Juventus).
"To go there and win would be a tremendous way to end to the campaign.
"We want to make it look like the score-line at Celtic Park was a little bit flattering to Juventus. We'd like to go, compete and try and win the tie."