Yoka is coming off 3 consecutive losses, one to a journeymen and while I've always thought Wallin was overrated from the Fury fight, he still probably beats Yoka who probably isn't even Audley Harrison or David Price level.
I'm french Wallin easy, Yoka is a shadow now. But Wallin don't have the power for stop him, he will win at the decision like Ryad Merhy or Martin Bakole.