It's a night of major significance for the Premier League title race and Brendan Rodgers could have a crucial say as he prepares Leicester City to take on defending champions Manchester City.
The former Liverpool boss has been in his new role for two months after leaving Celtic to return to the Premier League in March. Ahead of Monday night's crucial tie, he spoke to Sky Sports about his decision to leave the Scottish champions and his feelings towards the club now.
It was a bitter exit poorly received by the Parkhead faithful. Banners unfolded at during a game against Hearts described the former manager as a "fraud" while footage emerged of a disgraceful IRA chant allegedly sung by Celtic fans in an Edinburgh pub.
It prompted Celtic to release a statement admonishing the incident and labelling the chant as "disgusting and pathetic behaviour."
It has done little to sour Rodgers feelings towards the club.
I've been a Celtic supporter all my life. Friends, family, that has always been my club. A really, really difficult decision I had to make from a professional perspective. I will always be a supporter of Celtic and always be a fan. That will never change.
Sometimes in your life, your own personal challenges and goals may take you away which it did do but I had an incredible time and some great memories with supporters and family.
With your heart, I would always be there. No matter where I've been in my life, I always looked for the Celtic results and when I could get to games.
He explains it was purely a professional decision: "There comes a time in your life when the professional challenge... you have to look elsewhere. That doesn't change who I support. I will always support Celtic."
In his absence, Celtic successfully completed their title defence and are on course for yet another domestic treble. During his time at the club, Rodgers won seven trophies. It's clear it remains a stint he recalls fondly.