Jermain Defoe's move to Rangers has ensured that there may be an interesting subplot in his first Old Firm clash with Celtic this season.
That's because there is already a bit of bad blood between the new Rangers striker and Celtic goalkeeper Craig Gordon from 2009.
Gordon, who was playing for Sunderland at the time, suffered a broken arm in an incident involving the then-Tottenham Hotspur hitman.
Speaking in 2017, the 36-year-old said The Record: "I went out to dive at his feet, he kicked my arm – and broke it. Watch it and judge for yourselves."
The veteran Hoops keeper needed three operations to repair the damage and although Gordon claims that the incident still rankles him, he says there'll be no animosity when he comes up against the Rangers marksman this season.
He told The Express: "I wasn’t happy at the time. I was annoyed. I did think he meant to kick me rather than the ball, which happens in tackles anyway. Sometimes you mean to give the player a little kick. And I’m not suggesting he meant to break my arm. He’s not that type of player.
“He did try to contact me afterwards, but I declined the opportunity to speak to him. I was still too angry, but that’s long finished now.
“I’d shake his hand. No problem. I’m just going to get on with the game. There won’t be any problem.”
Despite saying he's over it, the Celtic keeper will certainly be extra motivated to keep out Defoe on March 30 - the next scheduled Rangers meeting.
But it's easier said than done.
The evergreen striker has 162 Premier League goals to his name and could very possibly take the Scottish Premiership by storm.
He could and probably will have racked up a lot of goals for the Gers before he faces Gordon, and the Scotland international could have his work cut out for him.