KSI believes that Tyson Fury would be 'obliterated' by Francis Ngannou if the two were to meet inside a cage.
Fury and Ngannou are set to meet later this month in what will be the latter's professional boxing debut.
Throughout the build-up to this particular contest, Fury has expressed an interest in potentially facing Ngannou in an MMA fight, but if that were to happen, KSI claims that it would be a one-sided affair.
"I think he [Francis Ngannou] would be faster in MMA," KSI told DAZN when asked about whether Ngannou would beat Fury if the two were to meet in MMA.
"I think Fury would get destroyed, yeah absolutely obliterated."
KSI will be looking to produce something similar on October 14 when he faces Tyson's younger brother, Tommy Fury, in the main event of MF & DAZN: X Series 10.