Daniel Dubois and Fabio Wardley face off in arguably the most anticipated rematch of the year, and you can follow all the action live with ESPN.
Their first battle, in May, will be a strong contender for fight of the year, and the WBO heavyweight title is up for grabs again in London.
- Team Wardley accuses Dubois of fouls, calls for stronger referee
- Dubois vs. Wardley: What the stats tell us about the fight
Dubois won the first fight with a Round 11 stoppage after climbing off the canvas twice in the early rounds.
Will it be repeat or revenge at The O2?
Wardley's team was unhappy with what it perceived as rough tactics by Dubois in their first fight.
Michael Ofo, Wardley's manager, told ESPN they will ask officials to watch Dubois' methods that they were unhappy with last time out.
"I wasn't happy with the MMA rugby tackles, there were a few points where he [Dubois] was putting the thumb [out] and sort of pawing in Fabio's face in an effort to open up the cut more," Ofo said.
"A few rabbit shots and leading with the head.
"We're calling for a stronger referee. Fabio's too much of a gentleman to call those things out, but my role is to highlight these things.
"As much as it a was a fantastic fight, there were those issues that in the second fight could be the difference between Fabio winning and losing."