Defender Emilio Izaguirre limped off with a knee injury and forward Georgios Samaras sustained a hamstring problem in the Celtic Park encounter.
And with the Hoops hosting Champions League opponents Juventus in the first-leg of their last 16 tie in 13 days, Lennon admits he is concerned.
Lennon said: "Emilio should be okay. He just felt a little bit of tightness at the back of the knee.
"Georgios, we think, may have a slight strain but he will be scanned tomorrow and we are hoping it is not too serious.
"It is two weeks until Juventus and if it is more than a mild strain then it will be a concern. At the minute it doesn't look too bad but the scan will reveal more tomorrow."
Meanwhile, the Celtic boss confirmed Norwich had made a third unsatisfactory bid for striker Gary Hooper ahead of Thursday's transfer deadline.
"Never say never," Lennon added. "But we had a third bid yesterday from Norwich but that was rejected. It was well short.
"We haven't put a price on him but if people want to make a bid then fine but they will have to come forward with the money."