Tyson Fury branded Deontay Wilder an "idiot" and "sore loser" after their post-fight exchange in Las Vegas.
Fury defeated Wilder with an 11th-round knockout, coming back from two knockdowns in one of the most entertaining of heavyweight fights.
But the pair did not exchange typical post-fight pleasantries, with Fury claiming Wilder said he did not "want to show any sportsmanship or respect" to his opponent after the Gypsy King went over to say well done.