Another day, another Twitter beef.
Who else would cause it than the ultimate wind-up merchant Conor McGregor.
Just over a year ago, the biggest fight in history took place as the king of boxing and the king of the UFC took each other on in a memorable bout.
However, in true McGregor fashion, the controversy started before Mayweather and himself even entered the ring.
Retired boxer Paulie Malignaggi joined the McGregor camp ahead of last year's fight to help the UFC champion prepare for his fight against Mayweather. However, things didn't exactly go to plan.
Following a video being released by Dana White, McGregor and his team gloated about a knock-out punch which sent the retired boxer to the canvas.
Despite this, Malignaggi remained adamant that this wasn't the case.
However, a recent tweet by the twitter account MMA History Today, stated: "It was one year ago today, when Dana White released a video of Conor McGregor dropping Paulie Malignaggi."
McGregor later quoted this tweet and said: "Time flies when you're on your ass."
A low blow from Conor with the tweet racking up over 50,000 likes at the time of writing.
Nevertheless, Malignaggi responded.
“Dude has had 2 kids and an ass kicking since this and he still lives off a fake knockdown that he knows wasn’t real lol. @TheNotoriousMMA [Conor McGregor] your feelings are still hurt? Don't get ur feelings hurt u lil b**** its still our lil secret. Don't run for your life when they ring the bell,” the retired boxer recently shared.
However, McGregor will almost certainly have his eyes set on the bigger prize.
The Irishman is set to make his return to UFC as he will take Khabib Nurmagomedov at UFC 229 on October 6.
This will be his first UFC fight since the Mayweather encounter last year.