Back in September, when Aberdeen and Celtic met in the league, there was a controversial moment involving Scott McKenna and Odsonne Edouard.
Celtic striker Edouard was on the receiving end of a high tackle from Aberdeen defender McKenna, which was deemed reckless by many spectators.
With both legs off the ground and little control, McKenna collided with Edouard with a scissor tackle, although replays did indicate he touched some of the ball.
Nonetheless, it was a dangerous tackle and the SFA retrospectively banned McKenna for the incident.
For the first time since that tackle, Celtic and Aberdeen meet again. And the game just happens to be the final of the Scottish League Cup.
In such a highly anticipated game, there is even more on the line for Edouard on a personal level.
The young Frenchman will be eager to get the better of McKenna after what happened at the end of September.
The 20-year-old has been in fine form this season and will look to get on the score sheet if he gets the nod ahead of Leigh Griffiths.
But McKenna, 22, will be tasked with keeping Edouard quiet and delivering a solid performance for the Dons.
It should be an interesting personal battle to watch, given their recent history, but Edouard is likely to be relishing the challenge.