Once a key Celtic player, the Invincible hero now finds himself without a club and is available as a free agent. Celtic FC logo during ... by Harry Langer DeFodi Images Defodi 541 FCBCEL0250218 ...

It had also taken a Scottish-record figure to sign Kieran Tierney from Celtic in the summer of 2019, when he joined Arsenal.

The incident has stepped up a level after North Curve Celtic fans among others were kettled before the Old Firm clash ...