Interesting, and maybe gives Mundo an idea of where he sits @175 given Bivol dominated Castillo back in 2018 on the undercard of Uysk v Witherspoon IIRC. Will be interesting to see if Callum can use his natural gifts of height and reach better than he did @168. Not sure McGirt can suddenly fix all Mundos flaws, but Callum deffo needs some changes.