A tweet has been sent from boxer Anthony Joshua's Twitter account to Tyson Fury telling him 'get fit you fat fuck'. A message was also tweeted to another heavyweight champion rival, Deontay Wilder, to say Joshua is 'ready and waiting' for the offer of a fight.
The tweets also implied Joshua, who is known as a 'nice guy' of boxing, was taking offence after he was seemingly accused of showing the 'real Anthony Joshua'.
The tweets come just hours after Joshua insisted he wasn't 'ducking' any fight, adding that his would-be opponents had just been 'making noise' on social media.
In an interview with IFL TV Joshua said: "There's one thing talking and acting, but negotiations don't happen over social media.
WATCH AJ'S PUNCHING POWER
Credit: BBC / The Graham Norton Show
"I'm serious about becoming undisputed heavyweight champion and we're making sure these guys who are making noise will back up what they're saying.
"It's no problem if Wilder wants to fight early next year, but no offers have been made to me.
"Let's present him with an offer, and see how they feel about that. If Wilder's not making an offer, we'll do it on my terms."
And it seems like Wilder will be more than willing to accept, having 'declared war' on Joshua following his first-round knockout of Bermane Stiverne last weekend.
Speaking after retaining his title, Wilder asked of Joshua: "I know I am the best. Are you up for the test?
"I've been waiting on that fight for a long time now. I declare war upon you. Do you accept my challenge?"
However, Joshua has urged Wilder to do things properly. He told IFL TV: "Deontay has called me out, which I did not expect as I've not seen any contract or offer in place.
"I've had to take it on, in my time off, to make plans to travel to America and discuss negotiations so I can become undisputed heavyweight champion of the world.
"I have been taking challenges throughout my career - even as an amateur I was doing that, and I fought for a world title in my 16th professional fight.
"I've never been in the business of ducking anyway, I'm not afraid of anyone."
Meanwhile, Fury told Sky Sports he was also keen for a chance to fight the heavyweight champ. He said: "You have two years out of the ring and it gives you that va-va-voom to get back in there and bust a few heads.
"Do I need that many warm-ups? I don't think so. Am I a 40-year-old? No, I'm 29. Still got a long time in boxing. I'm just so happy and excited to potentially be a part of one of the biggest fights in British boxing history.
"People say, why do you think it's that? I'm saying it because two unbeaten heavyweights, one unified champion, one lineal champion, both over six foot six tall, both over 18 stone. One nice guy, one bad man - it is what it is. I think the public are going to relish the thoughts of making this fight happen."