Jake Paul insists neither KSI nor his brother Logan want to fight him after watching the pair's reunion on Logan's podcast.
The duo were heated rivals for two years during which they fought twice in 2018 and 2019, drawing the first before the Brit got the better of the rematch with a split-decision victory.
And while fans were delighted to see the pair looking friendly while filming in the UK, Logan's younger brother Jake was unimpressed by the showing.
After Logan posted a photo showing him and KSI laughing on set of his podcast 'Impaulsive' following an hour-and-a-half on-air chat, Jake took to Instagram to insult the duo.
"A picture of two men who don't want to fight me," Paul said in an Instagram story post alongside the photo of his brother with KSI that was captioned "look how far we've come".
And Logan responded by saying he "of f***ing course" doesn't want to fight his own brother, but said he would if he had to before calling Jake a "p****".
"The only thing you're fighting is hangovers in Ibiza," Jake said in response to his brother's post.
Jake and Logan Paul went back-and-forth on social media
(Image: Getty Images)
"Your hamster didn't 'run away' in middle school like I told you, I returned it to the pet store 'cuz it smelled like s***.
"What are you gonna do? Cry about it? Make an Impaulsive? Predictable."
However, it appears that the back-and-forth is just friendly banter, with the younger Paul brother then jokingly saying that their mother Pam Stepnick had asked if she could bet on him to beat his older sibling.
In a series of clearly faked texts from "Definitely My Mom", she supposedly said "Nah you should for real beat the f*** outta him.
"F*** that piece of s*** I didn't even want him… This ain't fun this s*** personal, beat that bloody podcaster and knock some f***ing sense into his brainless body."
And Logan replied with a jokey 'crying' voice message asking if it was a legitimate text from their mother.
The pair are two of the biggest stars in social media, and have been able to transfer their fanbases to the world of boxing, with the younger brother the more established fighter, while the elder is the bigger money maker.
Logan recently faced Floyd Mayweather in an exhibition bout at the Hard Rock Stadium in Miami, which was just his third outing in a boxing ring in any competitive capacity.
He went the eight round distance with Mayweather, and due to the exhibition rules, there was no result awarded despite Mayweather clearly the better fighter.
It came after he had fought fellow YouTuber KSI in two boxing fights over 2018 and 2019, which ended in a draw first at amateur level and a loss in the professionally sanctioned rematch.
Meanwhile, Jake has yet to lose a boxing match at any level, winning his one amateur bout before going 3-0 in the paid ranks.
He defeated YouTubers Deji Olatunji and AnEsonGib in his first bouts in the amateurs and pros, before taking on Nate Robinson in his second bout of 2020.
Paul brutally knocked out ex-NBA star Robinson on the undercard of Mike Tyson v Roy Jones Jr in November last year and then faced former UFC fighter Ben Askren in April.
He stopped Askren within the first round, and now faces Tyron Woodley in his fourth bout, and his toughest test to date.