Undisputed super welterweight Jermell Charlo will face Tim Tszyu on Saturday January 28 next year.
The 2023 clash will see all four belts at 154lbs put on the line against the unbeaten Australian.
Charlo last fought in May when he defeated Brian Castano to become undisputed.
Tszyu was in action in March when he defeated Terrell Gausha in Minneapolis to secure the WBO Global super welterweight strap.
Here's everything you need to know about Charlo vs. Tszyu.
The main card is yet to be confirmed but the undercard should start around 9 p.m. ET / 6 p.m. PT, with ringwalks for the main event likely to be 11 p.m. ET / 4 a.m. GMT.
The fight will be shown on Showtime in the US (click here for more information), while detais for a UK broadcaster have not been confirmed.
The fight will be staged at the Michelob Ultra Arena in Las Vegas, Nevada, USA.