Dillon Danis is speculating on the cause of KSI’s illness that led to the fight’s postponement.

Danis and KSI were set to settle their rivalry in a 185-pound grudge match, headlining Misfits Boxing 21 on March 29 at Manchester’s AO Arena. However, on Friday, the influencer boxing promotion announced that "The Nightmare" had fallen ill, forcing the entire event to be postponed. A new date is expected to be revealed next week.

KSI took to social media to reveal that he has been battling an illness for the past three weeks but remains determined to reschedule the fight.

I tried my hardest, but my body has legit just given up,” KSI said. “I’m currently in bed, taking antibiotics, trying to recover, but I’m struggling. I’m coughing up greenish, yellowish sh*t all the time... I tried sparring and training, but my body feels weak. My stamina is just falling off a cliff... I want to move the fight to another day because I still want to knock out Dillon Danis.

However, the YouTuber-turned-occasional-boxer’s reasoning failed to convince "El Jefe," who flooded X with scathing posts ridiculing his would-be opponent for withdrawing. The exchange quickly escalated into a fiery war of words between the two.

In one of his many posts, Dillon Danis shared a screenshot listing symptoms of anabolic steroid withdrawal, several of which aligned with those KSI mentioned in his video. He implied that the 31-year-old Londoner’s illness could be a result of it.

The two were initially scheduled to clash in January 2023, but just a week before the showdown, the ever-controversial MMA fighter withdrew without providing a clear reason. Both last stepped into the ring at MF & DAZN: X Series 10 – PRIME Card in October 2023, where Danis fell to Logan Paul, while KSI suffered a loss to Tommy Fury.