Anthony Joshua showed his nasty side when he told Tyson Fury to “get fit you fat f***” on Twitter last week.
The heavyweight champion is usually so mild mannered and humble, and it’s his personality that has endeared him to the British public as much as his immense talent.
To see that type of attitude in such a brutal sport as boxing is rather surprising.
The 28-year-old is gearing up for the biggest year of his career as he puts his IBF, WBA (Super) and IBO heavyweight belts on the line.
Fury, Deontay Wilder and Joseph Parker are all lining up to take on Joshua in what promises to be an exciting year for the heavyweight division.
Heavyweight accuses Joshua of making stunning comments
But before he can begin his preparations for 2018, the former Olympic champion must first deal with a shocking accusation that has been made his way by heavyweight Eddie Chambers.
Chambers, an American who lost to Wladimir Klitschko in 2010 and hasn’t done much else since, took to Twitter to accuse Joshua of calling him a “disgrace to the superior black race” on Instagram.
Eddie Hearn reacts
Now, before you start believing Chambers, Joshua’s promoter, Eddie Hearn, claims the message is fake.
“It's fake - look at spaces between underscore,” Hearn wrote in response.
More evidence against Joshua
Chambers then posted a video which appeared to show his claims were true, swiping from his direct messages with Joshua to the British fighter’s actual profile.
Meanwhile, this photo appears to show that spaces do genuinely appear in Joshua's official Instagram handle - which supports Chambers' claim.
Surely Joshua has to issue a response?
Pretty stunning, then. Maybe he's been hacked?
It was easy to wonder whether Chambers was simply using Joshua to become relevant but he could actually be telling the truth.
In which case Joshua will certainly have a case to answer to.