Fury does not have to build his physique like a muscled up bull raring to attack his opponent, it is about the skill involved much more than the physique and you only have to look as far as Ruiz for evidence after the way he destroyed Joshua in the first fight.
Upsets do really happen and that AJ and Ruiz is one of an example.People never anticipate that Ruiz could able to pull it off and same goes with that Fury and Wilder
but somehow that first fight was controversial which do end up on having a rematch which its clear as day on who did really won that fight.
You can really tell which one is a good technicalist plus having punching power. Physique is just one of the factors needed for you to win but always consider that
it wont really be enough if you arent able to bring up the others.