Lineal champion Tyson Fury erupted in the direction of Anthony Joshua, after watching the unified champion's stoppage win over Alexander Povetkin.
After getting rattled in the early going, Joshua knocked out Povetikn to in the seventh round to retain the WBA, IBO, WBO, IBF heavyweight titles at a very packed Wembley Stadium in London.
Fury is returning to the ring on December 1, when he faces WBC heavyweight champion Deontay Wilder.
The winner of Fury vs. Wilder will become the immediate top opponent for Joshua, who is already scheduled to return on April 13 in Wembley.
After the fight, Joshua named several potential opponents and Fury was not one of them.
The exclusion riled up the former world champion, who decided to erupt on Joshua and called him a sh*thouse.
"Why am I a sh*thouse though?’ Joshua told iFL TV. "Good luck to Fury, good luck to Wilder, it’s a good fight for both of them. It’s a good name on his record. I don’t know why he’s calling me a sh*thouse.
"Fury should take a leaf from my book, focus on Wilder, that’s all he needs to worry about, no one else. And he’ll do a good job that way. ‘Focus on other stuff and he’ll get distracted, but maybe he’s got his game plan and that’s his remedy, so good luck to him."
One of the bigger issues in making Joshua vs. Fury - should the Gypsy King upset Wilder - their promotional and network affiliations. Fury is tied to Frank Warren and BT Sport, while Joshua is under Eddie Hearn and Sky Sports. The elder member of the Hearn clan, Barry Hearn, has already made it clear that Fury will never receive a sought after 50-50 split of the revenue - even if Fury upsets the odd by knocking off Wilder for the WBC crown.