Anthony Joshua is putting his IBF belt on the line in Manchester on December 10, against Molina after protracted negotiations to fight Wladimir Klitschko fell through.
Joshua has reiterated his focus is on beating upcoming challenger Eric Molina, who he believes will "up his level" in pursuit of the world heavyweight title.
The champion has insisted that American veteran Molina was the most difficult possible opponent after Klitschko was no longer an option.