CHRISTOPHER JULLIEN has sent Celtic fans a defiant message upon his return from injury. 

The Frenchman says he is "back in business" following a year on the sidelines with a knee injury. 

The centre-back ruptured his cruciate ligament against Dundee United in December 2020. 

While he has yet to feature in any first team games since, he initially returned to training around October time before a further setback. 

This week, he was back involved with his team mates. 

Now, Jullien has vowed that 2022 will be a good year for him, with his return to action edging closer. 

He took to Twitter: "For sure 2022 will be a brighter year for me... So I'm wishing you all my people a bright and healthy year 22. Now let's go! #BackInBusiness."

Jullien joined Celtic for £7million back in the summer of 2019.