Summary
Use 'watch & listen' tab to catch up on weigh-in
Heavyweight rivals Tyson Fury and Oleksandr Usyk weigh in for their undisputed fight on Saturday in Saudi Arabia
Fury is lightest he has been in over four years
Usyk, the WBO, WBA & IBF champion, is almost 30lb lighter at 16st 6lb
Rivals are separated on by security during a fiery final face-off
Fight is first undisputed heavyweight bout in almost 24 years & will crown the first four-belt champion in the modern era
Both men undefeated with a combined record of 55 wins and one draw
Who are you backing on fight night? Can Fury cement his status as this generation's best heavyweight or will Usyk become a two-weight undisputed champion?
Follow fight night coverage from 19:00 BST on Saturday on the BBC Sport & website
Live Reporting
Bobbie Jackson
That's a wrappublished at 19:45 17 May
19:45 17 May
Day two of three in the bag.
From a dull news conference on Thursday to a fun-filled, chaotic weigh-in on Friday, it has been a contrasting couple of days.
Let's just hope tomorrow night delivers.
It is after all a historic occasion with the two best heavyweights in the game set to fight for all the marbles.
Get a good rest tonight because it's going to be a long one tomorrow night.
You can rewatch the weigh-in at the top of this page and there's plenty of content on the boxing index - click here - to get you in the mood.
Thanks for joining us and make sure you're back from 19:00 BST tomorrow!
I. CAN'T. WAIT.
'I just fulfil prophecies, that's all I've ever done'published at 19:43 17 May
19:43 17 May
Get Involvedpublished at 19:43 17 May
19:43 17 May
#bbcboxing, via WhatsApp on 03301231826 or text 81111 (UK only, standard message rates apply)
Re: Pete, 18:57.I would've been a great heavy weight, I had the power, the footwork, the lungs. Just ate too many biscuits.
Mikey Biscuits
Mikey Biscuits, if that is your real name, you'd fit right in with us here in the Salford office. Can't move for biscuits on this desk.
Mark your card for Saturdaypublished at 19:40 17 May
19:40 17 May
I know what you're all thinking, what time can we come and join you tomorrow night?
Well, we will be bringing you live text coverage 19:00 BST.
That means you better stock up on snacks, we'll be doing that from our base here in Salford, and find a comfy spot on the sofa because it's going to be a long one.
Kal Sajad and Sam Harris are in Riyadh for us and should be thrilling us with insights through the evening.
If you cast our mind back to March when Anthony Joshua fought Francis Ngannou in Saudi Arabia, the Briton only emerged for his ringwalk at 00:24 UK time.
Organisers are aiming for an earlier start for Usyk-Fury but their ringwalk is not expected before 23:00 BST.
Interested in who is on the undercard? Who is the referee? Who are the judges? You can find all the answers to those questions, plus more by clicking here.
We'll have plenty of content to keep you going through the night and will be across the IBF super-featherweight title bout when Joe Cordina defends against Anthony Cacace as well as Jai Opetaia's IBF cruiserweight title defence against Mairis Briedis.
Also, you might want to do a refresh on the history of the heavyweight boxing division because I've got a quiz to keep you entertained!
Arabian fights - the impact of Saudi boxing takeoverpublished at 19:37 17 May
19:37 17 May
On 30 April 2023, BBC Sport asked: why are boxing’s biggest fights not happening?
Fans were fed up and rival promoters were playing the blame game as egos, finances and broadcaster commitments got in the way.
Twelve months later, the sport is almost unrecognisable – thanks largely to the involvement of energy-rich Saudi Arabia.
On Saturday, Tyson Fury and Oleksandr Usyk contest the undisputed heavyweight world title fight in Riyadh – the latest high-profile fight to be held in the Saudi capital in recent months.
Boxing has been given a facelift but, as with most cosmetic procedures, there are risks attached.
Fighters are earning high pay cheques, yet just a handful of British fans can afford the luxury of travelling to the Middle East.
Promoters are working together but critics point to a “flat” atmosphere in Saudi Arabia.
With ongoing allegations of 'sportswashing' directed at the nation added to the mix, BBC Sport explores the impact of the Saudi boxing takeover and what it means for the fight game closer to home.
'Just respect'published at 19:35 17 May
19:35 17 May
Tyson Fury and Oleksandr Usyk were initially scheduled to meet on 17 February but bout was postponed until 18 May after the Briton suffered a "freak" cut in training.
Usyk, who missed the birth of his daughter on 28 January as he trained in his camp in Spain, spoke to BBC Sport the day after he heard the date had been pushed back.
The Ukrainian was calm and composed, despite dealing with a major setback, insisting he still has complete respect for Fury.
How about those glasses too?
Postpublished at 19:34 17 May
19:34 17 May
Get Involvedpublished at 19:33 17 May
19:33 17 May
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Seriously...am I the only person who can't wait for Fury to be knocked clean out tomorrow?
Jon in Yorkshire
‘Boxing is the winner!’published at 19:30 17 May
19:30 17 May
Sam Harris
BBC Sport in Riyadh, Saudi ArabiaDerek Chisora with the loveliest of sentiments after I asked for a prediction…
“Whoever comes out on top, it doesn’t matter. Boxing is the ultimate winner here.”
“To have this many fans, all the way in the Middle East, it’s going to be electric!”
Postpublished at 19:27 17 May
19:27 17 May
There were so many people on that stage with belts being waved all over the place when Tyson Fury and Oleksandr Usyk were trying to get up close and personal.
It felt like they were getting ready to record the new Band Aid single.
Anyway, somehow the two fighters managed to find each other - it'll be much easier tomorrow night - and we got the fireworks we've been waiting for all week.
We came away from last night's news conference feeling slightly underwhelmed but it has ramped up several gears now!
Get Involvedpublished at 19:23 17 May
19:23 17 May
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Well that's the weigh-ins out of the way.
Oleksandr Usyk comes in at 16st 6lb and Tyson Fury is 18st 7lb - a 29lb difference!
How pivotal could that gap prove to be?
The pair have gone in opposite directions.
Usyk is at a career-high weight.
Fury is the lightest he has been since 2019 when he weighed in at 18st 1lb for his fight with Otto Wallin.
Fiery face-off!published at 19:21 17 May
19:21 17 May
We've been waiting all week for some scenes and we got some tonight...
Postpublished at 19:21 17 May
19:21 17 May
It's all over with the weigh-ins and the video live stream at the top of this page has ended.
If you missed any of that then you can rewind.
Big fight feelpublished at 19:18 17 May
19:18 17 May
Sam Harris
BBC Sport in Riyadh, Saudi ArabiaWell, if you didn’t feel it yesterday. You’ll be feeling it now. That’s the most we’ve seen from either fighter all week in terms of talking and action.
The fans have definitely livened it right up in Riyadh.
Postpublished at 19:18 17 May
19:18 17 May
Oleksandr Usyk:
"Don't be afraid. I will not leave you along tomorrow."
On what message his late father would have given him before the fight: "Son, you can."
On whether he is feeling the pressure: "It's my plan. If I was nervous I wouldn't win."
Message to fans: "I love you! See you tomorrow!"
Postpublished at 19:15 17 May
19:15 17 May
WBC champion Tyson Fury:
"I'm going to knock him right out.
"I'm coming for his heart. He's getting it tomorrow, spark out. They [his team] can all get it if they want it."
Fury ends the interview abruptly and storms off the stage.
Postpublished at 19:14 17 May
19:14 17 May
The pair have another face-off and this time it gets messy.
They go head-to-head and then Tyson Fury pushes Oleksandr Usyk in the chest.
Argy Bargypublished at 19:13 17 May
19:13 17 May
Sam Harris
BBC Sport in Riyadh, Saudi Arabia“FINALLY!” One fan chants behind me, presumably unimpressed with the lack of action at yesterday’s press conference…
Postpublished at 19:13 17 May
19:13 17 May
Tyson fury weighs-in at 18st 7lb.
That is more than a stone lighter than he was against Francis Ngannou and the lightest he has been since his fight with Otto Wallin in 2019.
He is still almost 30lb heavier than Usyk!
Gold, gold, goldpublished at 19:12 17 May
19:12 17 May
Sam Harris
BBC Sport in Riyadh, Saudi ArabiaIt’s hard not to notice ALL of the gold being held up by Usyk’s camp here He’s one more belt away from claiming it all.