Rabchenko was being outclassed by Rhodes early on but he took Rhodes' shots and grinded him down. Does Brook hit harder than Rhodes? I'm not so sure. Rabchenko is pretty basic but he's a pressure fighter and has decent power. Brook has struggled with that type of fighter before.
Watched Knobchenko being humiliated by a shot Choc Mundine in 2014 losing on points. An easy night's work for Brook if he is anything above 10% of the fighter pre GGG.
Good fight for a return. Rabchenko is ok but Brook should win comfortably if he still has ambitions of fighting for a world title. Needs an easier return fight after the last couple but still a respectable opponent.