After cruising to victory against Swarmz, KSI did PRESSUPS in between rounds.
After three years, the YouTube star was back in the ring and organized TWO opponents in one evening.
KSI performing press-ups between rounds against Swarmz
KSI did not exert much energy, but he defeated Swarmz - realname Brandon Scott - in just four minutes.
He scored a knockdown in the first round and seemed well on his way towards winning.
And KSI, 29 years old, was so relaxed that he started doing press-ups during his time of rest.
Swarmz, 25 years old, was unable to make it through the fight. A left hook ended the fight.
KSI stated: "I believe once he felt power, he was immediately like, 'Yo! This is long!'
"I was like, "Cool, get he out, and now I'm ready to go for my next one."
Now, the Londoner has some time to rest and recuperate before facing Luis Alcaraz Pineda (Mexican professional boxer), at the main-event.
Swarmz was bleeding from his nose and vowed to come back stronger after his late-notice debut.
He stated that he had to lose weight. It took me 20 days to lose 12kg, so it was quite a challenge.
It was difficult, I had to learn to box. It's possible to get it from any YouTubers Joe Weller or anyone else.
"I'll take anybody, f*** it. You give me more time, and I'll get it."
Swarmz was defeated in two rounds
