I guess this is a dangerous fighter for Golovkin indeed, After Drawing in his first fight with Canelo Alvarez and losing the second one I really think that he will have a very hard time with Derevyanchenko, Talk about getting bias here but that is how I see things and Derevyanchenko is durable in the ring he doesn't have blazing speed but he is not slow either.
Derevyenchenko got a formidable power but not that formidable and he is a guy that is not easy to be hit, I guess Golovkin is not so motivated in this fight not like what he has between a Canelo Alvarez fight, We might say that he is not motivational to win this so I guess we can see a Derevyanchenko win it might be a Unanimous Decision regarding the performance Derevyanchenko could give.