The Irish Sun cited a source close to McGregor who told the newspaper that the UFC lightweight champion and Mayweather “have both settled on their respective fees.” The source added, “The contract hasn’t officially been signed yet because of a third-party holdup, but all the details have all been agreed on.

“The fight could even be announced within two weeks.”

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On Saturday, Mayweather told ESPN’s Stephen A. Smith at an NBA game that “we’re getting very, very close,” but that nothing is guaranteed until the deal is finalized. On Tuesday, ESPN reported that McGregor arrived in Las Vegas, where Mayweather lives and trains, and a Nevada State Athletic Commission official confirmed that it was aware of active negotiations.

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“There is a lot of real stuff going on,” Anthony Marnell, the commission’s chairman, told ESPN. “It still seems like a long shot, but when there is a lot of money involved, people tend to figure it out. There are a lot of cooks in the kitchen, but I’m not sure if we’re going to eat.

“The Nevada Athletic Commission, in my experience, has always been well-briefed by all parties on an event or potential event that may take place in Las Vegas. We are aware of conversations and information that has been disclosed and not disclosed in the media. Whether these conversations will get to a point that a fight happens, I can’t tell you.”

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As for the “third-party holdup” cited by the Irish Sun, that could involve UFC President Dana White, whose company has McGregor under contract and who has repeatedly thrown cold water on the proposed fight. In January, White said that the chances of the showdown taking place were about the same as him “being the backup quarterback for [Tom] Brady” in the Super Bowl.

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White did offer Mayweather $25 million to fight McGregor, but that was mostly to call the retired boxer’s bluff, after Mayweather had said on ESPN that he’d give McGregor $15 million to fight him. Mayweather, who insisted that his September 2015 win over Andre Berto, which ran his record to 49-0, would be the last fight of his career, has stated that he won’t enter the ring again for less than $100 million.

Mayweather has also indicated that he’s aware McGregor is one of the few possible opponents who could generate enough interest to help him reach that massive figure. “Only thing that I’m probably interested in is the Conor McGregor fight,” Mayweather told ESPN’s “First Take” in January. “I’m a businessman, and it makes the most business sense, I think.”

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The Irishman has broken UFC records for pay-per-view revenue, but he also sees Mayweather as a means to the biggest payday of his life. In November, McGregor said, “Tell Floyd and Showtime, I’m coming. . . . I want $100 million cash to fight him under boxing rules because he’s afraid of a real fight.”

More recently, Mayweather said, “I believe the fight could happen. . . . Let’s give the fans what they want to see.” Around the same time, McGregor said that the fight “is being more than explored. That fight has been in the works for a while now.”

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McGregor made those comments during a pay-per-view interview session in England, at which he also said that, if the UFC tried to stand in the way of a boxing match with Mayweather, he could use the “Ali Act” to maneuver around his contract with the MMA company. That piece of legislation, officially called the Muhammad Ali Boxing Reform Act, has a “Protection from coercive contracts” clause that McGregor could potentially cite in a courtroom battle with the UFC, and it may explain why he chose to get a boxing license from the state of California (Bloody Elbow has a detailed explanation here).

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To further tease the promise of a fight, McGregor posted footage of himself in a training session last week for a boxing match. “Why conquer one world when you can conquer two?” he’d said during his PPV interview.

McGregor has never fought in a sanctioned boxing-only match before, and Mayweather, who is arguably the greatest defensive boxer ever, would figure to the betting favorite if the fight were to take place. However, Mark Henry, who coaches the man McGregor defeated for the UFC’s lightweight crown, Eddie Alvarez, recently said the MMA icon “has a chance of knocking out Mayweather if it was in the first three to four rounds.”

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After scoring a quick knockout win at UFC Fight Night 104 earlier this month, Chan Sung Jung (a.k.a. “The Korean Zombie”) said, “I’m a fan of Conor, as a fighter. I think he’s done great things for himself. Under boxing rules, though, I don’t see any way that Conor could beat Mayweather. If I were to bet on that fight, I’d put every last cent I have on Mayweather.”

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