Dmitry Bivol is facing a tough challenger in Lenin Castillo who has proven to be physically strong and has a very good chin. Castillo´s record stands at 20-2-1 and he is coming from 2 straight victories since he was beaten by Marcus Browne by a lopsided decision. His 3 blemishes on his record, the 2 losses and the draw, has all come against unbeaten fighters. Bivol has compiled a perfect record of 16-0 with 11 stoppage wins but has been forced to go the distance in his last 3 fights. It is very common that the knockout ratio drops as the level of competition increases. in Bivol´s last 3 fights he has fought: Isaac Chilemba, Jean Pascal and Joe Smith jr. Those 3 are all quality fighters and he clearly outclassed them.
Basically the only thing Castillo has going for him in this fight is his size and will to win. It´s not that he can´t fight because he can as he showed against Marcus Browne who he was able to put down, but it´s just that Bivol does everything better and is right in his prime. It is very unlikely that he will have any kind of success in this fight. The pick is Dmitry Bivol to win.