UFC living legend Conor McGregor has reportedly been issued a professional boxing license in the state of California.
The move, if true, intensifies speculation that mixed martial arts king McGregor could lure undefeated square-ring champion Floyd Mayweather Jr out of retirement for an epic showdown. McGregor and Mayweather are two of the biggest names in world sport and a meeting between the two would go close to breaking all-time pay-per-view records.
Mayweather has featured in the three biggest boxing pay-per-views of all time including the record-breaking "Fight of the Century" in 2015 when he defeated fought Manny Pacquaio with 4.6 million paying TV viewers generating $400 million.
McGregor has headlined three of the four biggest UFC pay-per-view events, including the record-breaking UFC 202 when he took on Nate Diaz in a rematch of their first meeting in the welterweight division.
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That event reportedly produced an unprecedented 1.65 million paid views.
The 28-year-old McGregor created UFC history last month when he became the first fighter to hold both the lightweight and featherweight titles when he defeated Eddie Alvarez at UFC 205.
Mayweather, 39, is one of the greatest boxers of all time. A five-division world champion, he remained undefeated in his 49-fight career.
On Tuesday, he posted on social media a photo of a $100 million cheque in his name, received after the Pacquaio fight.
"Y'all still have to work however, I'm happily retired," Mayweather wrote.