Virgil van Dijk bit him when they played against each other. And he feels the mentality of the current Parkhead defence is miles off what it used to be after their 10 In A Row quest was given another jolt in a shock draw at home to St Johnstone.Chris Kane looked to have Saints on the road to victory with a strike 11 minutes from time but Mohamed Elyounoussi came off the bench to steal a point.
That's of little comfort to under-pressure Neil Lennon though and Stevenson pointed to an incident involving Kane and French Hoops defender Christopher Jullien to explain how some Celtic players aren't competing like champions.
Read more on dailyrecord.co.uk