Conor McGregor has come to an agreement with the UFC that has moved a proposed fight with Floyd Mayweather closer to reality.
UFC President Dana White said he reached a deal with McGregor , MMA's biggest star and lightweight champion, and will now start negotiations on a mega fight with the retired Mayweather that could be one of the best selling fights in history.
"I'm not saying the fight will happen, but I've got one side done. Now it's time to work on the other," White said.
McGregor confirmed the contract for the boxing match in a statement.
"The first, and most important part of this historic contract has now officially been signed off on," McGregor said.
"Congratulations to all parties involved. We now await Al Haymon and his boxer's signature in the coming days."
Mayweather was in London this week and told reporters he would end his nearly two-retirement for what could be the richest payday in fight history.
Mayweather's fight against Manny Pacquiao in 2015 sold 4.4 million pay-per-view buys and McGregor is the UFC's top draw.
"There's only one fight that makes business sense," Mayweather said.
"I came out of retirement because I'm a businessman and I want to give the world what they want to see.
McGregor's a fighter. I'm a fighter. This is what the fight fans and MMA fans want to see."