Right, so here's some history.
Josh Warrington beat Kid Galahad in the amateurs.
The pair come from Leeds and Sheffield respectively, so there's always some rivalry.
Galahad was handed a two-year backdated doping ban in 2016. Warrington believes his rival hasn't really showed any remorse, while Galahad said the offence stemmed from someone putting something in his drink.
The whole doping chat has raised its head in the build-up to this fight, as you may expect, with Warrington stating Galahad is lucky to have a career.
Galahad's team have said Warrington is lacking hunger now as a result of his world-champion status.
Warrington did not enjoy that assertion. At Friday's weigh in, some videos emerged of his fans chasing Galahad out of the building.
So there. It's heated and they don't like one another. You're up to speed.