Ahead of the Joshua vs Klitschko fight next weekend, the IBF heavyweight champion has ripped into Tyson Fury on Twitter after he called him 'a poor man's Frank Bruno'.
Joshua has been relatively quiet on social media in the lead up to the big fight, but his latest tweet has racked up thousands of retweets and favourites.
Here's how the exchange went down...
Tyson Fury taunted the British heavyweight with a typical tweet:
But Joshua was having none of it.
He called the 28-year-old out, saying he is "always talking bullshit" around fight time. He did, however, offer him two ringside seats but suggested that he "didn't bring a plus one" because the second seat is for "his fat ass".
Fury tried to respond:
But Joshua looks to have got the last word in:
This isn't the first time Fury has taunted Joshua.
Back in April last year, Tyson claimed that he wasn't impressed with AJ and reckons the challenger is just a 'body builder':
"I just think Joshua is useless. He's got no footwork, he can't box and he's got no jab so that means he's useless. All he's got is a big punch, which everyone who pumps iron for five years and is 6ft 6ins can punch like.
"Unless Martin walks straight into a load of shots, which I don't see him doing, then I see Martin taking him out cold and it will be goodnight Vienna."
Joshua or Bruno?
Let us know your thoughts in the comments.