For 80 minutes he had been locked in a very physical battle with Curtis Main, standing his ground and taking the knocks from his tussle with the Aberdeen forward.
Chris Jullien never budged, never flinched, learning some Scottish lessons from his battle with Lyndon Dykes earlier in the season that saw him say sorry on social media ten days after the match.
The Frenchman is a fast learner, he knows the demands at Celtic are to win every game as Neil Lennon’s side chase down a ninth successive title win. Jullien gets it.
When Kris Ajer galloped up the park to pop in Celtic’s second goal his defensive colleague Julllien was first on the scene to congratulate him.
Despite an 80 yard run up the park followed by an arcing run to celebrate in front of some gobby Dons fans, Ajer never budged when his 6 foot 6 team mate landed on his back.
Jullien and Ajer held out for the last 10 minutes, another hurdle was overcome with Jullien very much on course to pick up his first championship medal.