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.