He was lacking side pressure.
He was more defensive, so he could not do anything against Larratt.
He gripped so low that it gave Devon more advantage to take the centre.
Denis didn't even try to attack at once during all the rounds.
Devon blasted him with almost 20-25 surges that made Denis tired.
Denis should not have uploaded his sparring video online, as it gave Devon an idea about his plan.
He should have fought with other top guys before getting into this match.