What is happening?
The fight later today is a rematch between Tony Bellew and David Haye, a year since Bellew defeated Haye in a memorable first encounter.
The original December date was postponed because of an injury to Haye, but the pair have rearranged.
Now it's time to see whether Haye can win at the second time of asking.
When is it and where is it taking place?
Saturday 5 May, 2018 - ie tonight - at the O2 Arena in London.
What time will the fight start?
All will depend on whether the fight night schedule is running on time, but expect the ring walk to begin before or around 10pm BST.
What TV channel is it on?
This one will be on Sky Box Office - channel 491 for standard definition and 492 for high definition.
It will cost £19.95 for those looking to watch in the United Kingdom.
You can find out full details on how to order, live stream and more here.
What have they said?
Tony Bellew
"I'll beat David Haye no matter what day of the year it is. Ten years ago or right now, it doesn't matter.
"I'm faster than anyone he's ever faced, I'm someone who can dictate, I'm someone who can make him miss, I'm someone who's got enough pop in his punch to make him think twice about engaging.
"I'm not saying I'm better than any fighter he's faced because he's faced much better fighters than me - Wladimir Klitschko is far better than me but he can't do the things that I can do.
"Quite simply it's styles make fights. My style is just wrong for David Haye and he should have stayed well clear of me.
"Any version of David Haye that comes in, I will adapt and I will adjust accordingly and I will defeat him again."
David Haye
"Last time the script was thrown out the window and the unpredictability of sport revealed itself in its most raw form.
"Bellew somehow won the lottery in our first fight, but believe me, he won't win the lottery twice.
"I've been training every day for over six months. I already feel fitter, stronger and more athletic than I did for our first showdown. I will relish the opportunity to re-write the ending of the Haye-Bellew story."
What happened last time?
Tony Bellew caused a huge upset in the first fight in March, stopping Haye in the 10th round.
Haye, on his third fight in his boxing comeback, appeared to injure his right Achilles in the sixth round but fought on courageously despite virtually being a sitting target.
It emerged on Sunday that Bellew had also suffered a bad injury during the fight - breaking his hand as early as the second round. However, it didn't prevent him from dominating the battle.
What are their records?
Tony Bellew:
- Fights - 32
- Wins - 29
- KO - 19
- Losses - 2
- Draws - 1
David Haye:
- Fights - 31
- Wins - 28
- KO - 26
- Losses - 3
- Draws - 0
What are the odds?
- David Haye win - 4/9
- Tony Bellew win - 2/1
- Draw - 33/1
What is our prediction?
Haye will feel like an injured right Achilles stopped him winning the first fight and will have plenty to prove. If he can stay fit, he should be favourite for this rematch.