Anthony Joshua defends his status as undisputed heavyweight champion of the world against Andy Ruiz Jr, his first fight since September 2018.
Madison Square Garden, New York is the venue for the June 1 bout.
Joshua was due to fight Jarrell Miller but the date fell through after Miller failed multiple drugs tests.
That offered the Ruiz the chance to step up in class and test himself against Joshua, although the champion is heavy favourite to keep his belts and possibly set up a showdown with Deontay Wilder.
Here is how you can ensure you do not miss a moment of the action on another big night for British boxing.
What TV channel will it be on?
The fight is being shown on Sky Box Office in the UK, which is on channel 491 for standard definition and channel 492 for high definition.
How much will it cost to watch?
It will be £19.95 up until midnight, Friday, May 31. Thereafter, there will be a £5 booking fee for bookings made by telephone.
How to watch the fight in the UK?
For those with Sky:
Subscribers can purchase the fight online here, through their box or online the telephone - 03442 410 888. If you're calling from the Republic of Ireland, it's: 0818 220 225.
How can I live stream the fight?
With Sky Sports Box Office you can watch the fights live via your PC/Desktop/MAC, NOW TV box, iPhone, iPad, Android phone or Android tablet.
It's simple to sign up, pay and watch - create an account and pay at www.skysports.com/boxofficelive.
What have the fighters been saying?
Ruiz on facing Joshua:
“I think my speed, the aggressiveness, the head movement is going to give him a lot of trouble.
“I’ve been sparring with a lot of the guys he’s been sparring and they tell me the same thing too.
It gives me motivation and gets me back in the gym to train harder.
“I don’t want to say [who said that] because then they’re going to go back over there and they’re not going to have work.”
Joshua on Ruiz's style:
"Ruiz doesn't weigh as much, he is a lot quicker than Miller and I think he uses punch variety and punch selection a lot better than Miller does.
"His punch output is a lot lower but he is more accurate with his punches. I have to be better with my defence, a lot tighter and be smarter against someone like Ruiz.