KSI called out Devin Haney, boxing's world champion, for a tweet gaffe before his fights.
The YouTuber will take on Swarmz, a rapper, and pro boxer Luis Alcaraz Pineda, at the O2 Arena on Saturday.
Devin Haney was criticized by KSI for trying to find a stream free of charge for his fights.
Haney claimed that he had mistakenly followed the account
KSI made fun of Haney, the lightweight world champion, before the fight. He had 'followed a Twitter boxing page titled KSI vs Swarmz live streaming free'.
KSI shared photos showing the proof via Twitter and stated: "Just wanna ensure you're gonna be paying for the fight bro @Realdevinhaney."
Haney, a red-faced man, responded sheepishly to the request. However, he claimed that he was not trying to support the page.
He said, "That was an accident [sic ]....]. He replied: "That was an accident [sic]....
The 28-0 fighter was not able to convince his fans that he made a mistake.
Many mocked Haney's claim that the following was accidental, casting doubt on it.
One fan wrote, "Ofcourse bro, it was an accident. I'm going to have the same accident.
Another said, "We know it wasn’t an accident bro. You’re like the rest.
A third replied: "Yeah, of course you searched for 'KSI Vs. Swarms Live Streaming Free' and then followed by 'accident.
Deji, KSI's younger brother, will fight alongside Yousey, his YouTuber opponent, on the undercard.
