The day is just beginning for many of our UK-based readers but already we have had one of the great boxing matches.

Read all about it in the report below, and we will see you later!

Image source, Getty Images

Terence Crawford dismantled Errol Spence Jr to become the four-belt era's first undisputed welterweight champion.

The WBO champion, 35, knocked Spence down three times before the referee ended the punishment in the ninth.

The win makes him the first man to win undisputed titles in two weight classes as he stripped his domestic rival of his WBC, WBA (Super) and IBF titles.

Spence, 31, was undefeated in 28 fights and the Las Vegas showdown was his eighth world title bout in a row.

But Crawford, in his 18th consecutive championship bout, staked a firm claim as the world's best boxer as he extended his win streak to 40 fights at T-Mobile Arena.

Read the full report here.

Terence Crawford on potential rematch: “It definitely doesn’t have to be at 147lbs. I’m in the hurt business - 147lbs was kind of hard for me too so 154lbs wouldn’t be out of reach of anything”

I thought Terence Crawford spoke so well in his immediate post-fight comments, humble and respectful of his opponent.

Here's a little bit more from what he said: “I’m so blessed. I only dreamed of being a world champion. I’m an overachiever.

"I want to thank Spence and his team, because without him none of this would be possible.”

American Claressa Shields - the only other fighter to become an undisputed champion in two divisions - was watching on in Las Vegas.

Image source, Twitter

Kal Sajad
BBC Sport boxing reporter

In less than a week we've seen two fighters stake their claim of being the pound-for-pound star of world boxing.

On Tuesday, Japanese superstar Naoya Inoue stopped Stephen Fulton to become a four-division world champion.

True to his nickname, 'Monster' Naoya strikes fear into most opponent. His knockout ratio (22 stoppages in 25 wins) is unreal for a fighter in the lower weight classes.

But then you have Crawford, a future hall of fame star who tonight showed he is levels above anybody else in his division. His all-round boxing skills are unmatched.

You can make a case for either fighter being the best in the world.

A reminder that Errol Spence had never been knocked down in his career before tonight. It happened three times in this fight alone.

Kal Sajad
BBC Sport boxing reporter

Astonishing. Masterclass. Sheer-dominance. There are millions of superlatives you can use to describe that performance by Terence Crawford.

So many pundits, fighters and fans felt it would go the distance. Many picked Errol Spence Jr to win. Hardly anyone saw it go the way it did.

Crawford worked his opponent out in the first round and then stamped his authority thereafter. The jab, the shot variation, the power punches - it was a joy to watch. We witnessed greatness.

For the benefit of our readers in Europe who are just starting their day, here is a brief recap of what you missed.

Terence Crawford stopped Errol Spence Jr in the ninth round in Las Vegas to become the undisputed welterweight champion.

Crawford produced an incredible display of boxing that Spence simply had no answer to.

He now holds the WBO, WBC, WBA (Super) and IBF belts and is now a two-weight undisputed champion, becoming the first male to achieve the feat in the four-belt era.

Amir Khan
Former world champion on TNT Sports

I don't think the rematch would do Errol Spence any good. I think he will get beaten even worse. Maybe even get hurt and knocked out earlier.

Carl Frampton
Former world champion on TNT Sports

The fighter of our generation, everybody would agree is Floyd Mayweather. I think Terence Crawford is now the fighter of our generation. That performance beats Floyd Mayweather at welterweight in his prime.

NestaMcG: Difference was simple Bud hitting like he got bricks in his gloves. Spence hitting like he got pillow cases in his. Talking of pillows....goodnight!

Amir Khan
Former unified light-welterweight world champion on TNT Sports

On what it is like to face Crawford: He was always one step ahead of you. He was making me miss by inches.

He has such a great sharpness, his jab today is what got him the win. It is so accurate, so patient. It was like he was hitting him when he wanted to hit him.

One of the best performances I have ever seen. Spence is one of the best fighters in the world. The fight he had there, how Crawford destroyed and dismantled him. Wow!

Former world champion Carl Frampton on TNT Sports: "That was one of the best boxing performances I have ever seen. I've seen many over the years but to make an elite fighter like Errol Spence look not elite, very ordinary at times, was very special."

What do you think? Would a rematch be closer? Thumbs up for yes, thumbs down for no.

And let's hear from Errol Spence: "He was the better fighter on the night, he dictated with the jab, my timing was a little bit off and he was catching me between shots.

"His timing was just better tonight, I make no excuses. He was the better man tonight.

"He was throwing the harder jab, he had his timer down on point."

Re-match? "We've got to do it again. I would be a lot better, it would be a lot closer. We got to do it again."

A bit more from Terence Crawford, on the stoppage: "It was a good stoppage. I was on the verge. The referee did what he was supposed to do to protect the fighter."

Re-match? "Of course the public would buy it, look how many people came out to show us both support tonight. If the fight happens again I am pretty sure the support will come out again for both of us."

Alongside some of the greats? "I am so mixed, so many emotions. I just want to thank God, that's all I want to do. I want to give honour to him."

Terence Crawford is up on the ropes celebrating. He then slips on the belts before giving his thoughts on the fight in the ring.

"I want to give honour to God, because without him none of this would be possible," he says. "I only dreamed of being a world champion. No-one believed in me when I was coming up, but I made everyone believe.

"I kept praying to God I would get the opportunity to show the world how great Terence Crawford is and I believe tonight I did that.

"Spence is a tremendous talent, he has a great jab and we were worried about it coming in. But take away his best attribute and the rest is history."

Brilliant from Terence Crawford, outstanding from start to finish. Errol Spence showed great bravery to stay in it for so long but he was well beaten in the end.

Crawford is the undisputed welterweight champion!

He is now a two-weight undisputed champion - the first male to achieve the feat in four-belt era.

Image source, Getty Images

Crawford is surely so far ahead on the cards that he can afford a quiet round, but almost everything he has done in this fight has been on point. His defending has been strong, and his punches well placed and well timed.

Spence is wobbling on his feet now and gets caught a couple of times as he tries to connect with some shots of his own.

Crawford senses the end is near and goes in with a strong right hand before the referee steps in!

It's all over, brilliant from Crawford!