Anthony Joshua set to snub Sky Sports and join TV rival for next fight
Joshua had been expected to remain on Sky Sports for the remainder of his career.
Since turning professional after winning gold at the 2012 Olympics, Anthony Joshua has been with the broadcasting giant.
In 2015, he fought on Sky Sports Box Office against bitter rival Dillian Whyte and has since remained a PPV star.
Joshua - who will fight Usyk in a bid to become a three-time heavyweight world champion this summer in Jeddah, Saudi Arabia - has admitted he will fight the southpaw differently in the second encounter after being outboxed in the first.
The Ukrainian pound for pound star outpointed Joshua at the Tottenham Hotspur Stadium in London to become a two-division world champion.
July 23 was the original date of the rematch but due to things taking longer than planned, Eddie Hearn has hinted it will now be August 20 so that they have enough time to promote the heavyweight spectacle.