The pair meet in the boxing ring as professionals for the first time on Saturday night and have traded insults for months both online and face to face.
It was at the Manchester Arena that they first fought, battling to a majority draw are six rounds of their amateur bout.
Both men have not been short of controversy since hitting the spotlight more than five years ago, something which has been amplified as the world eagerly awaits their professional debuts.
Speaking at a press conference in Los Angeles, KSI said “I’m going to f****** kill you,” comments which have been blasted.
KSI has since taken to Twitter to clarify his comments.
“Just want to clarify a statement I made yesterday at the press conference.
“I don’t intend to kill Logan physically tomorrow, I only intend to kill his YouTube career and spirit.
“After this fight, I still want Logan to be alive and well.”
The Staples Centre undercard features two world title bouts, with Billy Joe Saunders defending his WBO super-middleweight crown and Devin Haney looking to keep a hold of his new WBC lightweight belt.