Deontay Wilder unleashes that fierce right for the first time but it doesn't connect.

A couple of feints from Ortiz, trying to tempt his opponent into a mistake. Initially, the defending champion is not getting drawn in but eventually opens up and Ortiz takes advantage, landing another left.

Very good start by Ortiz.

Image source, PA Media

Ding ding! We're under way.

A cagey start, as expected, as both fighters size each other up. Luis Ortiz keeps his feet in check, wary of the powerful right hand of Deontay Wilder.

Ortiz loosens up as the first minute of the round ticks down and lands a good left hook. Good start by the challenger, tentative from Wilder.

Luis Ortiz is introduced to the crowd, a mixture of boos and cheers. He scrunches up his face and fist pumps the air.

Next up, the champ. Deontay Wilder strolls back and fourth as his list of achievements are read out and then punches the air as the crowd applauds his name.

The referee now relays the rules to both fighters, they touch gloves. Here. We. Go!

Deontay Wilder climbs into the ring and slowly raises both fists into the air to lap up the applause.

What an entrance!

Deontay Wilder, aiming to defend the WBC world heavyweight title for a 10th time, is certainly the showman.

He slowly walks out into the arena in an extravagant get up, glittering mask on and giant pointed shoulder pads almost prodding the eyes of his entourage.

The arena is absolutely jammed as Luis Ortiz makes his way to the ring. No emotion on his face as he walks through the cheering crowd.

Now for the Bronze Bomber...

"King Kong" Luis Ortiz, decked out in all white tonight, is doing a bit of shadow boxing as he prepares to make his way to the ring.

If, as is suggested, he is fitter than he was the last time these two fought then we could be in for an interesting night (morning).

Floyd Mayweather makes his way into the arena to take his seat, just in time to catch the ring walk for the main event.

Image source, Getty Images

Deontay Wilder’s purse is double that of Luiz Ortiz’s for tonight’s showdown.

Wilder will take home £2.34m ($3m), with Ortiz earning £1.17m ($1.5m).

Those amounts do not include PPV figures, ticket sales or sponsorship deals however. Taking those into account then, according to ESPN,, external Wilder is actually set to take home around £15.58m ($20m), while Ortiz will earn an estimated £5.45m ($7m).

Eyewatering sums. Although not quite Frozen 2 opening day takings ($41.8m)...

Mike Costello
BBC Sport boxing correspondent on Radio 5 Live

What I like about Wilder is that he gets it done. Even against Fury you can argue he didn't deserve the draw but I have watched back that replay of the 12th-round knockdown many times and the way he throws the two punches, he follows Fury's chin. It is carefully placed work and yet he is often dismissed as a wild swinger with no boxing ability.

He can be out-boxed by Anthony Joshua and Fury but against any one of the heavyweights in the world Wilder is no less than an even money shot.

It is approaching 9pm in Las Vegas, 5am in the UK and that's the undercard done and dusted.

Now it is time for the main event - Wilder vs Ortiz 2!

All over!

Leo Santa Cruz beats Miguel Flores by unanimous decision to take the super featherweight title. He is now a a four weight division champion. Not many fighters have managed that. Incredible achievement.

Mickey Wallis: I’ve got a horrible feeling staying up for this fight is going to be an anti-climax. Though the cricket would take me through to it but that’s equally depressing.

You can follow the cricket by clicking here. England aren't doing great.

Well the last fight on the undercard is certainly not getting the MGM Grand jumping for the main event. It has all been a bit of a snoozefest with few meaningful punches being thrown.

Into the final round with Leo Santa Cruz on course to just about get the better of Miguel Flores and take the super featherweight title.

Luis Ortiz is gloved up and sitting down once again with that electric blanket wrapped round his neck.

The 40-year-old looks like he is settling in for the latest episode of Antiques Roadshow rather than a world title fight. Appearances can be deceptive, though.

Boxing writer Steve Kim also spots Iron Mike...

Mike Tyson is in the house!

We are not only being treated to a whole host of boxing legends but also legendary suits. We've had Deontay Wilder's General suit, Lennox Lewis' suit lined with images of opponents he fought and Tyson has rocked up in a dazzling red suit.

Looking sharp, lads.

Mike Costello
BBC Sport boxing correspondent on Radio 5 Live

Image source, Getty Images

I see not necessarily a similar fight to last time but I do see Ortiz again giving Wilder plenty to think about.

One of the differences this time is Wilder goes there having had 12 rounds against Fury. A lot has been said on how that 12-round experience must benefit Fury but very little has been said on how it would benefit Wilder as that was only the second 12 rounds he had done. I think he will have grown from that.

I just think the calibre and pedigree of Ortiz, even at 40, means there is enough skill and guile to give Wilder problems, certainly for the first half of the fight.

Luke Reddy
BBC Sport boxing reporter

It was interesting that in his column with BBC Sport, Tony Bellew stated he believes Deontay Wilder will avoid any rematch with Tyson Fury.

The pair are of course slated to be fighting on 22 February. That said, that would involve a three-month turnaround.

By my mathematics, Wilder has not fought at such short notice since 2013 when he faced Nicolai Firtha off just under three months. The last time he fought Ortiz in 2018 he had nearly nine months off.

And - as Bellew alluded to - 'The Bronze Bomber' has again been stating in fight week that he will wait to see what happens when Andy Ruiz Jr faces Anthony Joshua on 7 December. All in all, the chances of Wilder-Fury II happening on 22 February are diminishing.