I expect Joshua to win a UD on points but if he knocks him out suddenly early on without putting on a hard sustained beating then something will be up. If Wladimir aint knocking Wach out roids or not then Joshua isn't without mischief going on.
Nevermind Mariusz Wach is just one opponent from a handful. There's quite a few names Hearn wants to put him in with in the running for september.