After watching the first fight I think Joshua has to adapt massively to Ruiz's style - I've watched the fight and to me it looked like Ruiz had his number from the start. I've also seen a few interviews where AJ seems convinced he only lost because of a "lucky punch" so I'm not sure his head's in the right place. That being said, he might just be saying that for show... hopefully the loss has humbled him a bit and he's done the work to get the win he's more than capable of getting. It's tough to predict, but I'll say the longer the fight goes on the more likely Joshua is to win - if he uses his reach advantage effectively and keep Ruiz at a distance he's halfway to a points decision. If he lets Ruiz in again, however, it'll probably end quicker than it did the first time.