Former heavyweight champion Tyson Fury (25-0, 18 KOs) is backing WBO champion Joshua Parker (24-0, 18 KOs) to win the upcoming unification with IBF, IBO, WBA champion Anthony Joshua (20-0, 20 KOs).

Joshua and Parker announced their fight on Sunday, for March 31 at Principality Stadium in Cardiff, Wales.

Parker is viewed as the underdog in the contest, with the Olympic gold medal winner expected to win by many with a knockout.

Fury, who has long praised the boxing abilities of Parker, expects the New Zealand fighter to come away with the biggest victory of his pro career.

"If I'm honest I fancy Parker, and that's being gospel," Fury said on the Pound for Pound podcast.

"He's young and ambitious, he's got fast hands, he hits hard and he fights excellent against opponents who stand still and don't move.

"Another thing is I've never met a Maori that ain't tough -- they're all tough as teak."

A win by Parker would certainly big blow for Fury - because a fight with Joshua would be the biggest event in British boxing and one of the biggest heavyweight fights in many years.

Fury recently parted ways with longtime trainer, his uncle Peter Fury, and hired Ben Davison to prepare him for a planned ring return in April. He is in the process of reclaiming his license to box from the British Boxing Board of Control.

The controversial boxer has been out of the ring since shocking Wladimir Klitschko for the IBF, IBO, WBA, WBO heavyweight titles back in November of 2015 in Germany. Fury lost the IBF title for failing to make a mandatory defense against Czar Glazkov, and then he was forced to drop his remaining world titles in order to deal with his mental health issues.

He would go on to lose his license to box after testing positive for cocaine and admitting to a substance abuse issue.