Tim Tszyu faces one of the toughest — and most unique — challenges of his career on Sunday when he gives up a 23-centimetre height advantage in his fight against Sebastian Fundora.

Tszyu was initially scheduled to fight Keith Thurman, but the latter had to withdraw due to a bicep injury suffered in training, seeing Fundora announced as the Australian’s new opponent.

It means Tszyu will be fighting for both the WBO and WBC super welterweight titles.

Tszyu is not the only Australian in action though with Michael Zerafa facing Erislandy Lara for the WBA middleweight title.

So what time can you expect the Australian duo to enter the ring?

LIVE BLOG: Follow Tszyu vs Fundora and Zerafa vs Lara right here!

BOXING: Don’t miss Tim Tszyu in a unified World Title fight this Sunday against 6-foot 6 Towering Inferno Sebastian Fundora. Plus catch fellow Aussie Michael Zerafa taking on Erislandy Lara for his shot to become the Middle Weight World Champion LIVE from Las Vegas | SUN 31 MAR 11AM AEDT | Exclusive to Main Event, order on Kayo Sports. No Kayo subscription needed.

Well, the prelims for the fight card begin at 9am AEDT with the main card getting underway at 11am.

Zerafa’s fight is the fourth on the main card so when exactly he makes his ring walk will largely depend on how long the previous three bouts last.

The same goes for Tszyu and Fundora, although their fight is expected to take place at around 2.30pm AEDT. With that in mind, look for Zerafa’s fight to begin at around 1pm AEDT.

FULL FIGHT CARD

Tim Tszyu v Sebastian Fundora — for the WBO and WBC super welterweight title

Rolly Romero v Isaac Cruz — for WBA super lightweight title

Erislandy Lara v Michael Zerafa — for WBA middleweight title

Julio Cesar Martinez v Angelino Cordova — for the WBC flyweight title

Elijah Garcia v Kyrone Davis — middleweight

Serhii Bohachuk v Brian Mendoza — for the interim WBC super welterweight title

ULTIMATE GUIDE: Everything you need to know ahead of Tszyu vs Fundora