Mayweather vs McGregor: Undercard fights, celebrity fans and build up - live

• Floyd Mayweather vs Conor McGregor live: Round by round fight updates from Las Vegas 

• Floyd Mayweather vs Conor McGregor is expected to start after 4am BST

• Here's how you can watch the fight tonight

• All the best betting offers including 40/1 on a Mayweather win

2:03AM

Time for a switch over to the blog for the main event

Please join us here for all the big fight coverage: Floyd Mayweather vs Conor McGregor live: Round by round fight updates from Las Vegas 

1:59AM

A unanimous decision

94-91, 93-92, 93-92 in Ugas's favour. 

1:57AM

Dulorme is throwing hard

But surely Ugas has done enough to win that even if he ran out of gas. Matthew Macklin thinks he shouldn't have had the points deducted and they will unjustly cost Dulorme. We're going to have to wait for the judges ... 

1:54AM

Dulorme has another point deducted in the 10th

So now he needs a KO and chases it. Ugas took the fight as a sub for Porter with only nine days notice and he looks cooked but if he hangs on he will win. 

1:49AM

Your pre-match meal?

Chicken and beans for Alan Shearer. Crunchy Nut Cornflakes for Norman Whiteside. For the Notorious GAD? 

1:46AM

An epic round seven

Dulorme is docked a point for a low blow but he puts Ugas on his seat with a hammer of a left. Ugas gets up after eight and the lost point may count dear but Ugas may not be able to hang in with the pace of Dulorme for nine more minutes.  

1:40AM

In the sixth Dulorme gets the upper hand

Working hard on the inside with punishing body shots - though Ugas is complaining about three low shots in the past two rounds. I still think Ugas leads by at least four points after the sixth but he looks in trouble now. It's a fine bout. 

1:31AM

Dulorme is down but not out

He has been on the canvas twice, clobbered by uppercuts and left hooks and is so far behind on the cards at the end of round four. But he has recovered some of his equilibrium and is getting close enough to stop Ugas freeing his arms for those big shots. It's a long climb back from here though ...

1:28AM

Gareth reports from Sin City

The quotes are in from the boys:
Juan Heraldez

"I was very prepared and I took advantage of this opportunity. I executed my plan and came out with a clear victory.

"Other than the knockdown, I thought that I outboxed him every other round. I did what I wanted to do.

"I let myself get distracted and that's why I got knocked down. I got a little ahead of myself. I'm the only person who can stop myself.

"The jab was really the key tonight. I dictated everything off of the jab and tried to use my angles, my footwork and my movement. 

"It feels great to be on this stage and it's moments like these where I can go out and compete and I can prove everyone right who gave me this chance.

"This was a prospect fight and now I'm on to bigger and better things. I'm ready to take the next step." 

Jose Miguel Borrego

"Heraldez ran the whole fight. I'm happy that the fans booed the decision because they know he ran. I came to entertain the fans and that's what I did.

"I have to cut the ring off better. I also need to let my hands go more and throw three or four punch combinations instead of just one or two at a time." 

1:25AM

Thomas Dulorme in trouble

In the second. Ugas puts him on the canvas with a rasping uppercut and he's bombarding him with shots in the third. It looks like the end is nigh. Ugas looks impressive, exploiting the static Dulorme's brittleness. 

1:22AM

There are loads of fans in town

But most are watching on close circuit because the pubs are being charged 10k to show it and can't justify it and ticket prices are eye-wateringly steep.

1:15AM

Next up a welterweight fight

Yordenis Ugas from Cuba, bronze medalist at the Beijing Games, who has replaced Shawn 'Showtime' Porter after the former champ suffered a bereavement, takes on Thomas Dulorme. 

1:06AM

See who's there

12:56AM

A unanimous decision for Heraldez

96-93, 97-92, 97-92 for Juan Heraldez. Thought it was closer than that.

12:54AM

Round 10

Heraldez, the Vegas native, fights back impressively in the last, shading the last round 10-9 I would have thought, using his hand sped to land a succession of combinations but Borrego hit him with the heavier and flashier shots throughout the fight though not in the same volume. 

12:49AM

Round 9

As Matt Macklin, the Sky boxing colour man said, Borrego has 'the equaliser' and doesn't he just show it, putting Heraldez on his tuchas with a vicious left hook thrown from a southpaw stance. Heraldez goes down but gets up on eight. His legs wobble for the last 90 seconds of the round but he just about hangs on. 

12:46AM

Borrego tags Heraldez twice

With a big right over the top at the end of the sixth and with the crispest of left hooks midway through the eighth but Heraldez continues to land more punches. Borrego needs a knockout now but has shown twice he has the ammo to pull it off.

12:41AM

Only in Vegas

12:34AM

Meanwhile ...

The first 10-round fight on the undercard, the third of the bill overall, between the undefeated welterweights Jose Borrego and Juan Heraldez, is five rounds old. Heraldez is ahead in my view. Borrego has lost his go-forward and he's being thoroughly frustrated by the swaggering Heraldez. 

12:29AM

The current Vegas odds

Are 9/4 for the fight to go the distance, 8/1 to end in rounds one or eight, 10/1 bar the rest. It would suggest that the bookies think Mayweather will be happy to go the distance, that he is too canny to be riled by McGregor's taunts and those strong racist undercurrents, that going about his business in the usual efficient manner suits him just fine. 

12:23AM

The Rock is doing tonight's voiceover

12:11AM

We are debuting our new judging tool tonight

Our three judges are former boxer Darren Barker, Mike Coppinger, senior writer for Ring magazine, and our correspondent, the one and onliest Gareth A Davies. We'll be publishing their round-by-round verdicts throughout the main event.

12:10AM

The second fight has finished 

And there's been an upset, Antonio Hernandez won the six-rounder on points, defeating  Kevin Newman 59-54, 59-54, 57-56.

12:04AM

A referee's judgment

11:55PM

Here's Gareth A Davies, our man in Vegas

11:43PM

All over Twitter at the moment

... given that I'm occupationally required to stare into the abyss this evening, are several people screenshotting Paypal accounts purporting to show their balance is at least several hundred thousand pounds, often a million and then pledging to pay anyone who retweets their message a sum of money, ranging from $30 to $200 if McGregor wins. There are comparable accounts pledging to do the same for a Mayweather victory too.  And thousands of eejits are retweeting them. What's all that about, then? 

11:26PM

The Telegraph asked amateur boxers for their predictions

11:23PM

The first winner of the night

Is Cleveland's Svannah Marshall, though she was introduced as coming from "London, England" because to some Americans there are only two places in Britain - London and Liverpool ... 

11:17PM

Savannah Marshall wins her first pro fight

11:10PM

Savannah Marshall opens proceedings

She's a two-time Olympian from Hartlepool and former amateur world champion making her pro debut in a four-round contest against Sydney Le Blanc. 

10:46PM

Eat like a champ

Wonder what Floyd Mayweather has for breakfast? His personal chef, J Santiago, has told TMZ that he usually has  eggs, home fries, grits, bacon, turkey sausage, turkey ham and pancakes. Bootiful, straight from the Bernard Matthews menu. 

10:22PM

Our man Gareth A Davies

Has been out and about all week. He posted this encounter with Chris Eubank snr last night but if you haven't seen his analysis of the way to beat Mayweather, it's as astute as you would expect.

10:12PM

Good evening

Rob Bagchi here to take you through the next few hours. You can tell when a fight is big - even Channel 4 News here in the UK covered it in its Saturday bulletin, usually a highbrow pleasure. They were rather fixated on McGregor's pants last night and their contents but that's by the by.The Daily Mail 's website was so exercised by the sight it even used the word 'erection' in a headline rather than 'manhood rampant'. Still, pots and kettles and all that ...

9:36PM

Gareth A Davies' big fight preview

Our man is in Vegas and ready for tonight's action. Here's his verdict on Mayweather-McGregor here.

9:15PM

Who are people backing? Mayweather or McGregor?

In short, the bookies believe Mayweather will win and you can see the latest odds for the fight here.

But because of the short odds on a Mayweather victory, many have been opting to take a punt on McGregor, as this graph shows:

8:55PM

Undercard line-up in full

While the main event dominates the airwaves, Nathan Cleverly vs Badou Jack will be one to watch a little later on.

You can read more on that fight here.

Gervonta Davis vs Francisco Fonseca, however, has lost its edge after Davis failed to make weight yesterday. The bout will go ahead as planned, but it will no longer have a title riding on it.

8:35PM

Huge fight - but will it be a sell out?

Ticket sales have been a big talking point over the last few weeks.

Prices for tonight's fight between are trending down, with many below the original list price.

Some tickets at the T-Mobile arena could be had for as little as $1,100 (£852), while seats closer to the action were being listed on secondary markets for less than they originally cost. A day before the fight, there were also hundreds of tickets left at the box office.

Jesse Lawrence of TicketIQ, a reseller and market analysis site, told the Associated Press promoters misjudged their market when they priced the arena from $2,500 in the upper sections to $10,000 at ringside. He said roughly 10 percent of the 20,000-seat arena remained for sale.

There were also plenty of closed circuit seats available at hotels owned by MGM Resorts at $150 each.

While ticket sales have been spotty, the fight is still expected to do huge numbers on pay-per-view. Up to 50 million people are expected to watch the bout in the United States alone. 

8:23PM

Just eight hours to go

Not so long a wait when the world has been talking about this fight for many months.

On Friday, 7,000 fans watched on as the pair weighed in for the fight and just after 4am on Sunday morning the world will watch them face each other for real.

We'll be bringing you all the build-up with our reporter Gareth A Davies in Las Vegas, along with the undercard fights before we switch to the big one.

You will not miss a thing here.

8:01PM

Floyd Mayweather vs Conor McGregor preview

Floyd Mayweather has dismissed Conor McGregor's insistence he will be exposed by a weight disadvantage when they finally fight in Las Vegas on Saturday night.

The 40-year-old on Friday tipped the scales at 149.5lbs, three and a half lighter than his Irish opponent and four and a half below the light-middleweight limit.

That he weighed in closer to the welterweight limit at which he has so consistently excelled suggests he has chosen to focus on speed, and that would be logical against the bigger McGregor, as he will avoid an excessively-physical fight.

Mayweather has repeatedly insisted Saturday's fight will be the last of his decorated career, and despite the likelihood his ability will make their match-up highly non-competitive, his impressive shape suggests he has thoroughly prepared.

McGregor is adamant the American is in "the worst shape I've ever seen", but Mayweather, who was also loudly booed by the Irishman's fans in his home city as they weighed in, said: "Weight doesn't win fights, fighting wins fights

"This won't go the distance: mark my words.

"This is going to be Conor McGregor's last fight also.

"The fans can't fight for him. It comes down to the two competitors."

McGregor is expected to be significantly heavier by the time the two fighters enter the ring, and he said of his undefeated opponent, who fights for the 50th time: "He's full of water: that's the worst shape I've ever seen him in.

"That's the worst shape I've seen in him. He looks out of shape; I'm going to breeze through him.

"I'm a professional; I make weight. It's about sacrifices, dedication, it's focus, I make it, and that's it. I've put in the work as everyone can tell. I'm ready.

"(I'll be) a lot bigger than him (on fight night). Pushing 170lbs.

"You'll never beat the Irish, and that's it. Las Vegas is ours now. I'll stop him in four. Let's see if he can take it."