Tim Tszyu will get back into the ring in August in Los Angeles against undefeated American Vergil Ortiz Jr, with the fight on a Terence Crawford undercard.
Nikita Tszyu was forced to go 10 rounds for the first time in his career but retained his Australian title with a unanimous points win over Danilo Creati.
Son-of-a-gun Alex Leapai Jnr will be in camp with Tyson Fury ahead of the heavyweight's historic world title fight against Oleksandr Usyk in Saudi Arabia.