The Hoops lost 2-0 in Turin to lose the two-legged Round of 16 fixture 5-0 on aggregate and Lennon suggests it was the difference in finishing that sold his side short.
"The difference is quality in the final third. We had good chance again tonight but we didn't take them," said Lennon.
"We played really good football, had good spells in either half and we missed what I think were very good chances to get back into the tie.
"The difference is quality, quality counts and that was the difference between the two teams over both games."