Here we go. Round 1.

Fifteen losses between them. Yet heavyweight boxing is so chaotic, they could still get a shot at a belt in the future.

Another defeat though and those hopes will be in pieces.

Image source, .

Here's Liverpool's David Price, who was speaking from his dressing room earlier on. He told Sky Sports Box Office: "Here we go. He's going to walk on to one (a punch).

"It'll be a tough fight, but I'll focus on one round at a time."

Image source, Rex Features

In the build-up things got nasty... and completely stupid.

British boxer Dereck Chisora has apologised for saying he is "going to kill" opponent David Price.

The comments came just eight days after American Patrick Day died aged 27 after suffering a brain injury in a fight.

Chisora, 35, said "I am going to murder this guy I swear down" at Thursday's news conference before the heavyweight fight on Saturday at the O2 Arena.

But afterwards, Chisora told BBC Sport: "I apologise for saying that. That was not my intention. David is my boy, it's nothing like that. It just rolled off my tongue."

Day was put into a coma after he was knocked out in the 10th round of his super welterweight bout in Chicago against Charles Conwell on 12 October and died four days later.

Promoter Eddie Hearn, who was sat with Chisora at Thursday's news conference, broke down in tears last week when paying tribute to Day.

Steve Bunce
Boxing pundit on BBC Radio 5 Live Sports Extra

I have the feeling we might see a boxing contest instead of something stupid and ferocious.

Seemed an awful long time ago that David Price was unbeaten in 15 or so fights. We expected him to be among the level of the Klitschko brothers.

Andy Lee
Former middleweight world champion on BBC Radio 5 Live Sports Extra

If he wins tonight and taking into account the absence of Dillian Whyte... Chisora is a prime candidate for a world championship fight.

The voice of boxing Michael Buffer is in the ring and here comes David Price. This is definitely a potentially career-changing night for Price. He's been written off, dismissed, unfairly,as a laughing stock. A win tonight and he is right in contention for a shot at the top.

Steve Bunce
BBC Radio 5 Live boxing pundit

Price boxing with confidence can beat just about any version of Chisora.

Chisora is one of the most remarkable boxers in recent British history. His record defies belief. He walks out and keeps reinventing his history. I think it's a really hard fight, a fun fight, and I think Price will win again, I really do.

Mike Costello
BBC Sport boxing correspondent on Radio 5 Live

There's a guessing game around Price. Has the win over Dave Allen given him the confidence surge that might make all the difference?

We know in the past that nervous energy has cost him - he has weakened so quickly during a contest. Against Allen it was so controlled. I know Allen is not Chisora, and Chisora has all that experience, but I think the boxing ability of Price is still there.

Maybe now, finally, he is beginning to become a proper professional boxer. I am genuinely excited at the prospect of this fight.

Dereck Chisora, meanwhile, will need to bring pressure to bear on his opponent given he stands almost seven inches shorter than Price. Meanwhile, he says the prospect of a world-title shot is secondary to financial goals.

"I'm a bit worried about this fight to be honest," said Chisora, who last fought for a world title in 2012. "It's a worrying fight for me right now.

"Winning a world title and retiring with no money doesn't mean anything for me. I want the money, man. I want shows where I get paid and secure the future for my family.

"There are so many fighters who are world title holders, some are my friends, and they have no money. I don't want to be that guy. I want to make the money."

Hopes of huge money days will be dashed if he loses to Price today.

"It's been a stressful journey but I am proud," Price told BBC Sport.

"I have stuck at it, persevered - a lot of people would have thrown their hand in, especially with the criticism I have had. I have hung around alike a bad smell for some people and that's why it's nice to shove it in their faces again. I do believe I am coming into my peak.

"This opportunity for me is massive. The upside is beyond what I thought was even possible six or 18 months ago. So it was a no brainer in the end."

Price has previously sparred countless rounds with Chisora - who starts a 1-4 favourite - and in his own words, will face "a bruiser of a man".

BBC Radio 5 Live Sports Extra

Tune into BBC Radio 5 Live Sports Extra for live commentary of Dereck Chisora v David Price right now, before switching over to BBC Five Live for Josh Taylor v Regis Prograis.

Press play at the top of this page to listen along to the best in the business - Mike Costello and Steve Bunce, with expert analysis from former WBO middleweight world champion Andy Lee.

Next up, this was not the original plan, but it is still a tasty one.

Dereck Chisora, 35, was meant to face former world heavyweight champion Joseph Parker, only for the New Zealand fighter to fall ill after being bitten by a spider.

It left 2008 Olympic bronze medallist David Price an opening to build on a run of three wins in a row and presents the chance to move to the outskirts of conversations linking him with the biggest names in the division.

It is the chance for a rebirth for 36-year-old Price, who faced ridicule after defeats in recent years and admits he felt a "relief" when he decided he would retire following defeat to Christian Hammer in 2017. Retirement never came and he says a falling bank balance kept him fighting.

Can he go from being written off to gaining the best win of his career?

That is the 28th win for Lee Selby in his 30th professional contest, while Ricky Burns' loss was his eighth, all coming on points and he's never been stopped.

If this is to be the end for Burns, a record of 43 wins (16 knockouts), eight losses, 1 draw and winning world titles at super-featherweight, lightweight and super-lightweight is one hell of a career.

Lee Selby speaking to Sky Sports: "I had to dig in at times. We're both Celtic warriors.

"I thought I had done enough. I could go down to super featherweight but feel more comfortable at lightweight.

"The dream is to be Wales' first two-weight world champion."

The first judge calls it 115-115, but the other two give it to Lee Selby, by 116-112 and 116-113 margins.

Where does Ricky Burns go from here? For Selby, maybe a route back to a world title.

It's all over. Not an amazing contest, but which fighter's career is going to be given a massive boost. We find out very soon.

A big right hook lands from Burns. But surely too late. Selby took it well.

One round to go. A big embrace between the two at the start of the last. Lots of respect, despite things getting tetchy. The consensus seems to be that Selby is winning by a few, with Burns needing at least a knockdown.

If this goes against him, is it the final three minutes of 36-year-old Ricky Burns' career?

But Selby is too smart, too wily, to avoid the Burns attacks. Holding when he needs to hold, retreating when he needs to.