WBC heavyweight champion Deontay Wilder was a notable absentee from ringside last night as Anthony Joshua defeated Joseph Parker by unanimous decision to add the WBO title to his haul of heavyweight championships.Alabama-native Wilder had been due to work as an analyst in Cardiff for both Sky Sports and US broadcaster Showtime during the fight, but pulled out earlier this week following a disagreement with Joshua's promoter Eddie Hearn over whether he would be allowed to enter the ring immediately after the contest to challenge the winner.Undeterred by the no-show, Joshua called Wilder out in his post-fight interview - predicting that he would score a knockout when the pair meet. It did not take the unbeaten American long to respond via a short video posted to Twitter."Oh my god, oh my god! My grandma always told me, if I don’t have something nice to say, I don’t say nothing at all." Wilder said. The 32-year-old also questioned the judges scoring, calling the decision "a robbery", whilst praising former champion Parker."What a robbery... WOW!! @joeboxerparker great job Bro omg don’t apologize you did nothing wrong true champion,” he wrote.Although Parker can take immense credit in becoming the first man to take Joshua the full 12-round distance in his 21-fight career, the New Zealander never really looked as though he would pull off an upset victory - and not many others joined Wilder in disputing the judges' verdict.A unification fight between Joshua and Wilder for the undisputed heavyweight championship does now look to be the logical next move for both men and despite what AJ and Eddie Hearn have claimed, the American certainly seems keen to make the fight a reality.

"Let’s make this fight happen, they are calling me out? That’s it, let’s make it happen," Wilder said, per The Metro.

"You should have just said you plead the fifth (amendment) when they asked about me. ‘It’s been a long time coming, a long time waiting for me. The time has come, you said you want me, let’s make it happen, I can’t wait," stated Wilder.

Despite all of the verbal sparring between the pair, neither Anthony Joshua or Deontay Wilder will want to miss out on the opportunity to call themselves the true undisputed ruler of the heavyweight division and cement their place in boxing folklore.

Fans will be hoping that the exchanging of words is replaced by meaningful negotiations for a fight in the near future.