Ireland's Conor McGregor has been been beaten in his first ever boxing fight.
Floyd Mayweather beat the Dubliner by way of technical knockout in the 10th round of their much-hyped fight in Las Vegas.
Mayweather, who came out of retirement for the fight, now has a record of 50-0 - surpassing heavyweight great Rocky Marciano's 49-0 record for most wins without a loss or draw.
Mixed martial arts champion McGregor, who was making his professional boxing debut, failed to pull off what might have been the greatest upset in combat sports history.
But he made the fight much more compelling than most experts had predicted at the T-Mobile Arena.
McGregor made a brave and spirited start but his 40-year-old opponent dominated from the fourth round.
The end came with a weary McGregor doubled over on the ropes as Mayweather landed two hard left hooks in the 10th.
WATCH: Imelda May's beautiful rendition of Amhrán na bhFiann in Las Vegas
Speaking after his win, Mayweather said of his opponent: "He's a lot better than I thought he was, he used different angles and was a tough competitor. But I was the better man tonight.
"Our game plan was to take our time, go to him, let him shoot his heavy shots early and then take him out at the end. In the MMA he fights 25 minutes really hard then he starts to slow down."
McGregor said Mayweather was "not that fast or powerful" but was "composed" and "patient with his shots".
"I thought it was close and I thought the stoppage was a little early," he said.
"I get looked at when I'm tired - I was just a little fatigued. It was some buzz, I thought we were close."
"It was a good fight, and a bit of fun." @TheNotoriousMMA #MayweatherMcGregor pic.twitter.com/YlSbnzzGiX
— UFC (@ufc) August 27, 2017
Conor McGregor enters the boxing ring!! It's really going to happen!! #MayweatherMcGregor pic.twitter.com/AckphqoPxY
— UFC Europe (@UFCEurope) August 27, 2017
The odds at fight time favoured Mayweather by a 5-1 margin.
There were a handful of US$1m bets on Mayweather, with three coming in just hours before the fight. The biggest reported bet on McGregor was US$100,000 (€83,857).
Some 50 million people were expected to watch the bout in the US alone, with the fight available online or on TV screens to more than one billion homes in 200 different countries.
The fight was predicted to generate up to US$600m (€503m), breaking the pay-per-view record set by Mayweather and Manny Pacquiao two years ago.
Whether it will be the richest of all-time is still to be determined, but Mayweather left no doubt of his place in the pantheon of boxing greats.
"This was my last night, tonight I chose the right dance partner to dance with," he said when asked if he would ever be seen in the ring again.
Nothing but respect! #MayweatherMcGregor pic.twitter.com/E6o1MZKN8q
— UFC Europe (@UFCEurope) August 27, 2017
These McGregor fans watching in Dublin told Sky Sports News their man did them proud.
Really brave effort from @TheNotoriousMMA but @FloydMayweather is a true champion of his sport.
— Gary Lineker (@GaryLineker) August 27, 2017
Conner kept it interesting but he was outboxed and outclassed in the square ring. Nothing to be ashamed of tho. I like him even more now! ????
— Lennox Lewis (@LennoxLewis) August 27, 2017
@TheNotoriousMMA u are the man brother!! U fought the best of our time in his game and fought like a champ. We are all proud of you. DC @ufc
— Daniel Cormier (@dc_mma) August 27, 2017
How ever, take it, or leave it 50-0 @FloydMayweather made it! @TheNotoriousMMA was disciplined in his debut and showed good boxing skills.
— Klitschko (@Klitschko) August 27, 2017
Respect to McGregor for taking a chance but congrats to Floyd on #50!
— Manny Pacquiao (@mannypacquiao) August 27, 2017
All the experts who trashed the (McGregor/ Mayweather fight) should apologize. It was competitive.
— George Foreman (@GeorgeForeman) August 27, 2017
We all know he can fight but if he can learn to adapt to 12 rounds Conor will be a very good boxer. A lot of millions richer. Happy days
— Carl Frampton MBE (@RealCFrampton) August 27, 2017
Hats off to @TheNotoriousMMA ...... amazing competitor and unreal athlete...congrats to @FloydMayweather 50-0 congrats! #legend
— Michael Phelps (@MichaelPhelps) August 27, 2017
Additional reporting: Jack Quann
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