Steve Bunce
BBC Radio 5 Live boxing pundit

You have to remember that some of the stuff KSI and Logan Paul have said, they're entertaining the Youtube community, not the boxing community. So it seems extreme. When they're talking to each other - although they have been training as boxers - all the dissing and trash talk is still for Youtube.

Image source, Getty Images

KSI's trainer Viddal Riley, speaking to Sky Sports: "KSI is feeling relaxed. All the work has been done so all he has to do is sit back, chill and wait for his moment to shine."

On his fight prediction: "KSI win, TKO (technical knockout) in the fifth round."

I've just noticed that KSI and Logan are now eligible for a page on Boxrec.

Forget 20m subscribers.

That's how you know when you've really made it.

Logan and Jake Paul are shadow boxing in the changing rooms. When they realise the cameras are on them, they embrace and smile.

KSI looks relaxed and gives a thumbs-up.

He got the better reception from the crowd then, too.

Bieber's not giving anything away, so instead let's see what other people think will happen tonight.

While the first fight went down as a draw, one of the three judges did give the fight to KSI.

Short and sweet interview pre-fight from Justin Bieber on the tele.

"I'm just a fan of Logan Paul. Youtube is really cool. It's where it's all going."

Sorted.

Craig Ormsby: Sign of the times me in bed watching England cricket team trying to overturn a big New Zealand score in the cricket, my 16 yr old son and his friends downstairs watching two YouTubers in a boxing match!

They may be YouTubers by trade, but KSI and Logan Paul have taken the training seriously.

BBC Sport challenged three beginner boxers to train like KSI to see if they can match the intensity of his workouts.

Who are they being trained by? KSI is under the watchful eye of unbeaten cruiserweight Viddal Riley, and Jeff Mayweather - uncle and former trainer of Floyd Mayweather - is also part of the coaching team.

In Logan's corner will be the extravagant former two-time heavyweight world champion Shannon Briggs - some of you may know him for his catchphrase 'Let's go, champ'.

Image source, Getty Images

How good are KSI and Logan Paul at boxing? Have they been taking it seriously? Why are some boxing traditionalists against it? Is it good for the sport?

This fight has divided opinion in the fight game. BBC Sport spoke to Eddie Hearn, pundit Steve Bunce and former boxer-turned-trainer Jamie Moore to explore what KSI v Logan Paul means for the sport.

Image source, Getty Images

Eddie Hearn, one of the biggest boxing promoters in the world, was so impressed with the first fight that he decided to get involved.

Hearn's Matchroom Boxing are promoting the fight, which is being shown on pay-per-view television.

Some traditional boxing fans are against the fight and see it as a bit of a gimmick, while others such as Hearn say it's the perfect opportunity to showcase the sport to a new and younger audience.

There's millions of greenbacks up for grabs tonight.

Image source, Getty Images

KSI and Logan have now become fully fledged boxers; going through medicals and getting a professional fighter's licence.

They'll wear smaller 10oz gloves, which means less padding. And there'll be no head guards.

The fight will take place over six three-minute rounds. Both fighters weigh under the cruiserweight limit of 200 pounds, which is just over 14 stone.

Image source, Reuters

Well, they've already had one boxing fight but it wasn't classed as a 'professional' bout.

They faced each other at the Manchester Arena in August last year - it was billed as 'the biggest internet event in history' as more than a million people watched it worldwide.

The contest ended in a draw, nicely setting up this rematch.

In fact, it will actually be KSI's third fight; in February 2018 he beat fellow YouTuber Joe Weller.

BBC Radio 5 Live

You can listen to commentary of tonight's action via this page or on the BBC Sounds app.

We've sent Steve Bunce over to LA. The biggest and best voice in boxing - alongside Mike Costello, of course - on the biggest of nights.

There's been plenty of trash talking between the two fighters in the build-up.

You know - the usual... somebody's going to get hurt blah, blah, blah.

But KSI ramped it up big time when he mocked the death of Logan Paul's beloved dog Kong, who was mauled to death by a cougar/mountain lion in the Hollywood hills a few months back.

Logan Paul hit back fairly sharply with some extremely low blows of his own.

The fuse has been lit.

Hagler-Hearns, Ali-Foreman, Fury-Wilder this ain't.

But where this match up between Youtubers Logan Paul and KSI falls down on elite level-style class, it more than makes up for in intrigue.

Oh and the numbers. The numbers are staggering - between them, these two have more than 40m subscribers on Youtube.

Who's going to win tonight? Even better, chuck a prediction my way.

Let me know on #bbcboxing, or text us on 81111.

Image source, Getty Images

KSI is a 26-year-old from Watford, his real name is Olajide William Olatunji but his friends call him 'JJ'.

He began his YouTube career by uploading videos of him playing computer game Fifa whilst he commentated on his goals.

But he's since gone on to become a rapper, comedian and an actor.

Image source, Getty Images

American Logan Paul, 24, is from Ohio but now lives in Los Angeles.

He first became an internet celebrity by uploading short video clips to the video sharing platform Vine, before focusing on YouTube.

His brother Jake Paul is also a successful YouTuber.

Shall we introduce the fighters? They're due in the ring at 4am UK time but we're guessing that might be delayed since there's a world title fight between Devin Haney and Alfredo Santiago just about to go down.

Late night boxing is notoriously tardy. Not ideal if you're battling to stay awake with copious amounts of caffeine and crisps.

Or if you've set your alarm clock and realised you've been deprived of bonus minutes in the sack.

Still, it'll be good. Won't it?