KSI will open his own undercard tonight at The O2 arena in London when he faces rapping rival Swarmz before returning hours later to face professional boxer Luis Pineda.
The YouTube star has been out of the ring for almost three years, but will surely be completely free of ring rust after not one but two fights in his return to action. And filling out the card will be a host of other YouTube celebrities, with the event's collective social media reach believed to be in the billions.
KSI's brother Deji will look to finally win a boxing match when he faces Fousey, who is 0-1, in one or the featured bouts. Meanwhile Faze Clan will be well represented by Temperrr and Sensei, who face Slim and King Kenny respectively, with other stars of social media competing on a stacked undercard.
Here's a rundown of the whole event...
KSI vs Luis Alcaraz Pineda
In the main event of the evening, KSI will return to the ring, assuming he beats Swarmz, for a second fight against 2-5 professional boxer Pineda. The tall, tricky youngster will prove a challenge at times in this one if he can utilise the skills he's built up in seven legitimate fights.
KSI will pull a brilliant troll tactic on long-time rival Jake Paul when he steps between the ropes with Pineda, given that he will be the first "legitimate" professional boxer either man has faced. Paul is 5-0 as a professional, but none of his opponents had ever competed, let alone won, when he first fought them.
Faze Temperrr vs Slim Albaher
Just three weeks ago, Faze Clan leader Temperrr was scheduled to fight a much different opponent in the tall rapper BlueFace. Unfortunately, issues outside of the ring cost him that fight and Slim, one of YouTube boxing's most dangerous men, was drafted into the fray instead.
Albaher is 3-0 and has stopped every one of his opponents, including Fousey who competes on this card. But due to a combination of his impressive skillset and his smaller social media following, he has been avoided by the big names in the scene, until now when he finally gets his chance in the co-main event.
Deji vs Fousey
Somebody's 0 has got to go, as the old saying went. After going a collective 0-4, one of Fousey or Deji will be walking out of the arena tomorrow night with a victory regardless of their history in the ring.
Deji has been beaten by Jake Paul, Vinnie Hacker and Alex Wassabi thus far since making his debut in 2018, and could be heading towards a disaster fourth loss or an iconic entry into the win column. Meanwhile, Fousey was viciously beaten in his debut against Slim in 2019 before turning his life around and getting in tremendous shape three years later for his return.
Faze Sensei vs King Kenny
There must be a great deal of admiration given to London's own King Kenny when it comes to his boxing journey. After winning a split decision in his debut against Faze Temperrr, the judges were brought back together days later to perform an unprecedented re-score, due to safety concerns at the venue, and the result was overturned.
So when he was offered a spot on tonight's card, Kenny could very easily have taken a handy challenger and got himself a win to announce himself on the scene again. Instead, he took on one of YouTube's most skilled combat athletes in Faze Sensei, who is 1-0 in the scene as well as competing multiple times in MMA and kick-boxing.
This will be a fascinating contest between two men who are really skilled between the ropes. No matter the result, you're looking at technically the best boxers on the undercard in this one.
Salt Papi vs Andy Warski
When he made his debut against Halal Ham back in March on the debut Showstar Boxing event, Tik Tok star Salt Papi's support went through the roof. It turns out the comical dancer was also a pretty impressive boxer, as he took a win over the previously 1-0 Ham and earned thousands of new fans.
Now signed to Daniel 'Keemstar' Keem's Happy Punch Promotions, Salt Papi could end up being a massive star in the social media boxing world, assuming he can get past controversial streamer Warski. The Canadian has battled back from drug addiction to get to this point, and will prove a difficult test for the fan favourite.
Sam Hyde vs IAMTHMPSN
The heaviest fight in YouTube boxing history has stolen the show during media week as comedian Hyde and Tik Tok star THMPSN have gone back-and-forth. The American has adopted a persona as 'The Irish Candyman', and if he can back up his antics in the ring then we could have another star on our hands.
But he faces a tough and fit challenge in Australian violinist Jordan 'THMPSN' Thompson, who has been training at Freddie Roach's Wild Card Boxing gym in California. The pair weighed in over 500lb collectively, and there's next to no chance that this fight will go the distance on the scorecards.
Deen The Great vs Evil Hero
Generally the 2-0 veteran of boxing at this low of a level would be the favourite against a debuting fighter, but not in the case of Evil Hero when he faces Deen The Great this weekend. Deen has been signed to Happy Punch Promotions after making a name for himself with street boxing videos, and is believed to be a future legitimate prospect in the sport.
He's set himself up with JackRabbit boxing in Long Beach, California and is one of the biggest favourites on the card with fans. However, Evil Hero has been training for a long time, and competed first when BKFC brought influencers in and then Celebrity Boxing, and will be far from a pushover as he looks in the shape of his life.
KSI vs Swarmz
Mirror Fighting understands that KSI has a party atmosphere planned for his two fights at The O2 arena tonight, and it's up to Swarmz to spoil it. The rapper was once pals with KSI, but they fell out over promotional issues around their top ten single Houdini in 2020.
KSI was initially supposed to face Alex Wassabi, but the American pulled out with an injury and has been replaced by Swarmz. The Brit has just about made the cruiserweight limit after a gnarly weight cut and only has a few weeks of boxing training, but he is confident that he can provide a monstrous upset.