When all the talk is finally over and these two heavyweights get in the ring, one thing is certain amidst the many variables: Anthony Joshua will have a considerable size advantage over Joseph Parker.
For whatever reason, the Englishman wouldn't look at Parker during their press conference to promote Sunday's world heavyweight unification title bout in Cardiff, but he stared down at the Kiwi throughout the face-off which came immediately afterwards.
Parker has a plan to deal with his size and reach disadvantage – he gives up 15cm in wing-span – and he was right when he said he likes fighting taller opponents. "In the past the bigger guys have suited my style better than shorter guys," he said.
The challenge, as he admits, is big, and he will need a lot of things to go his way should he emerge with the victory.
"I see him as a great champion," Parker said of his opponent. "The reason I wanted this fight is because I respect him. We respect what he's achieved in the boxing world, we respect his team and what they've achieved on this side of the world. We love challenges.