You ain't seen nothing yet.
The Celtic manager believes his Hoops heroes can play even better than they did as they defeated the Dutch masters 2-1 to kickstart their challenge for qualification for the Champions League last 16.
Now two points ahead of Ajax, two behind AC Milan and four behind Group H leaders, Barcelona, Lennon insists he always believed his side could storm back from their opening two defeats in the campaign.
By the time they head to Amsterdam a fortnight tonight, the Parkhead boss is confident he will have a stronger hand to play as injuries clear and fitness rises.
Scott Brown could be back, if his appeal against an extended suspension is successful.
And last night's scorers, James Forrest and Beram Kayal, plus Joe Ledley and Kris Commons will strip much fitter.
Ajax had more possession and shots at goal than Celtic, but Lennon is already savouring the prospect of the rematch and said: "I am not sure if Ajax can play better - but I am sure we can play better.
"Hopefully, we can get Commons fit and that will give us a boost. And we will see how the appeal goes with Scott.
"I think we can play better than we did last night, and I want us to play better, particularly in the final third.
"But the back four were once again brilliant. Charlie Mulgrew had another fine game, and Sami (Georgios Samaras) does what Sami does.
"If we can get more out of Teemu Pukki and Anthony Stokes, and certainly we can get more out James Forrest - he got better the more the game wore on - then we have got a chance."
He went on: "I asked for a team performance, and that's exactly what I got."