Christopher Jullien and Kris Ajer are a serious worry Neil Lennon. The 36-year-old pundit also believes both players would rank outside a top 10 list of Hoops' best stoppers of the 21st century.Commons has painted a bleak picture after Nicke Kabamba had the pair, and in particular Jullien, under constant duress during the 1-1 draw at Rugby Park on Sunday.
The big Frenchman also gave away the penalty which was dispatched by Chris Burke to allow Killie to get an equaliser.And the former Hoops hero fears the error-strewn showing in Ayrshire might be the start of a worrying run.
Speaking to the Daily Mail, he said: "If you were compiling a list of the best centre-backs to have played for Celtic over the past 20 years, the names of Jullien.
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