Floyd Mayweather and Conor McGregor’s fight week officially began on Tuesday with the two fighters making their ‘grand arrival’ at the Toshiba Plaza in Las Vegas.Of course, it was never going to go smoothly, was it?But rather than Mayweather and McGregor clashing, it was Paulie Malignaggi that was involved.Malignaggi, the former two-weight world champion, recently quit McGregor’s training camp after images emerged on social media suggesting he had been knocked down during sparring sessions.“Its not nice 2 paint a pic that isn't true, this was a pushdown in sparring, post the whole video rounds 1 through 12 UNEDITED,” he tweeted after the images went viral.

Malignaggi calls McGregor to show "what really happened"

Then, in an interview with ESPN, he urged McGregor to release the full video to show “what really happened.”

"I wanted to be part of this event, but I didn't want to become the story and that's what this has turned into," he said.

"I won't release any information about his game plan or what he's working on, I wouldn't do that. But this has become a fiasco.

"It's a circus. And I do want that sparring video released. I understand it can't come out now, but Conor, if you have any balls, release what really happened.”

Malignaggi and McGregor clash in Vegas

So, when Malignaggi turned up in Las Vegas while McGregor was talking to the media, it was never going to go well.

Soon enough, McGregor and his former sparring partner were face-to-face with Malignaggi repeating the question: “Did you bring your balls, Conor?”

Check it out:

Malignaggi then went on a full-on rant about the Irishman in front of the media explaining his behaviour.

Watch:

The boxing world 'is laughing' at McGregor

The American certainly isn’t keen on the UFC champion since their sparring sessions and claims the whole boxing world is now laughing at him.

"McGregor gets angry because boxing has not accepted him, but would an MMA fighter accept a boxer walking into their sport claiming that they are the best when he's never done it in his life,” he said earlier this week.

"That's the situation with McGregor in boxing, he is being laughed at and it is only getting worse as each video of a public workout or him shadow boxing is released.”

While the fight between McGregor and Mayweather is what everyone will be watching on Saturday night, the war of words between McGregor and Malignaggi is certainly something to keep an eye on ahead of fight night.