KSI was scheduled to make his big return to boxing to face Alex Wassabi in London.
The fight is off, so KSI has resorted social media to arguing with Jake Paul over the scuppered bout.
KSI makes his huge boxing comeback
Logan Paul was KSI's last fight and he won by a split decision at Staples Center.
In March, Wassabi defeated KSI's brother Deji.
KSI used to be out for revenge. But not anymore.
Why was KSI vs Alex Wassabi canceled?
KSI vs Alex Wassabi was cancelled due to an injury to Wassabi.
Wassabi posted on Instagram: "With all these rumours going round, there are only two things that can be true."
"I have recently sustained a serious injury, and I will be back soon.
"You shouldn't play with concussions." We have a new fight date.
KSI was last seen fighting in a pro-boxing win over Logan Paul
Is the event going ahead?
Jake Paul offered to fight KSI with two weeks notice. But KSI was not having it.
MVP and you are both so untrustworthy. KSI tweeted, "First Tommy, Rahman, and now Wassabi."
"Even if you put on events, all you do it lie to your fans and increase your numbers by 50 percent.
"We are privy to your transactions with each promotion and what you make. It's a joke.
"The industry now knows that you are not what you portray yourself to be.
"Your stock is in serious decline and you don’t have the right to dictate what I do, mate." We knew you would pull something similar.
KSI said that he had a rival sorted out and ready to replace Wassabi but didn't disclose who.
He said, "What you didn’t know was that we actually contracted another fighter to protect you guys from pulling something like this."
