Anthony Joshua during a press conference ahead of his fight with Wladimir Klitschko.
And Fury, who had to vacate his titles a year ago, took to Twitter to swipe a shot at Joshua ahead of the fight.
"We are proud to be Anthony Joshua's exclusive USA television partner as he attempts to establish his legacy against the legendary Wladimir Klitschko, live on Showtime Championship Boxing, as Showtime continues its unrivaled commitment to the sport".
Anthony Joshua has revisited the journey that took him from teenage tearaway to world heavyweight champion in the build up to his April 29 fight with Wladimir Klitschko.
Fury, who transformed the world heavyweight picture when he became the first boxer in 11 years to defeat Klitschko in 2015, paving the way for former Olympic champion Joshua's shot at a title, countered by saying: "I might be fat, but you're a paper champ and paper-chinned weightlifting rudeboy, wannabe badman".
Ronaldo treble ends Bayern Munich Champions League title bid
Needing at least two goals to progress, Bayern led when Robert Lewandowski confidently drilled in a penalty kick. Bayern, the 2013 Champions League victor , had made it at least to the semifinals for the last five seasons.
Fury, who is now in training himself for his long-awaited comeback after drug issues and depression, then responded: "I might be fat, but you're a paper champ and paper chinned weightlifting rudeboy wannabe badman!" Same offer as lst time. Know your place chump! "X2 ringside tickets dn't bring a plus 1 it's for ur fat ass", he replied.
Joshua is widely regarded as the biggest name in heavyweight boxing right now but Fury seems less than impressed with his compatriot.
"I saw in the Charles Martin fight, although it looked easy on the night, that was a fight for the world heavyweight title before his time". It's obviously a massive opportunity for both of us being a world title eliminator and it's my first scheduled 10 round fight so I'm relishing the challenge. "Or I'll come back and KO you". "I ain't going nowhere".
With Fury replying: "You shouldn't throw stones when you live in a glass house".