For the first time in 25 years, an undisputed heavyweight champion will be crowned when Tyson Fury and Oleksandr Usyk meet in Riyadh, Saudi Arabia on Saturday, May 18 (Sunday, May 19 in Australia).
Fury enters the bout as the WBC champion, while Ukraine's Usyk holds the IBF, WBA and WBO straps.
Will The Gypsy King's size prove too much to handle or will Usyk, having already collected all the belts at cruiserweight, become a two-division undisputed champion?
MORE: Which Australians currently hold world titles?
In the chief support, Australia's Jai Opetaia looks to defeat Mairis Briedis for a second time and reclaim the IBF cruiserweight title he vacated late last year.
Here's how to watch all the action in Australia:
How to watch Tyson Fury vs. Oleksandr Usyk in Australia: TV channel, live stream
Fans in Australia can tune into all the action from the "Ring of Fire" card live on streaming platform DAZN.
The event is a pay-per-view, which means existing DAZN subscribers in Australia will need to pay an additional $34.99.
What time is Tyson Fury vs. Oleksandr Usyk in Australia?
Fury vs. Usyk goes down in the early hours of the morning on Sunday, May 19.
The main card is due to kick off at 2am AEST, with the main event expected to begin around 8am.
Opetaia's is the penultimate fight on the card.
All times are approximate and will depend on the length of the earlier bouts.
| Main card | Opetaia vs. Briedis 2 | Fury vs. Usyk | |
| AEST | 2:00am | 7:00am | 8:00am |
| ACST | 1:30am | 6:30am | 7:30am |
| AWST | 12:00am | 5:00am | 6:00am |
Tyson Fury vs. Oleksandr Usyk fight card
- Tyson Fury vs. Oleksandr Usyk for the IBF, WBA, WBC and WBO heavyweight titles
- Jai Opetaia vs. Mairis Briedis for the vacant IBF cruiserweight title
- Joe Cordina (c) vs. Anthony Cacace for the IBF super featherweight title
- Frank Sanchez vs. Agit Kabayel; Heavyweight
- Moses Itauma vs. Ilija Mezencev; Heavyweight
- Mark Chamberlain vs. Joshua Wahab; Lightweight
- Sergey Kovalev vs. Robin Sirawn Safar; Light heavyweight
- Daniel Lapin vs. Octavio Pudivtr; Light heavyweight
- David Nyika vs. Michael Seitz; Cruiserweight
- Isaac Lowe vs. Hasibullah Ahmadi; Featherweight