Australian star Tim Tszyu will put his perfect 21-0 record — and all his unified world title dreams — on the line when he hosts dangerous former world champion Tony Harrison (29-3-1) in Sydney on Sunday.

Detroit native Harrison is the only man ever to beat ‘undisputed’ champ Jermell Charlo — the fighter Tszyu was supposed to meet in January before injury struck the veteran.

The winner of Tszyu v Harrison will therefore fight Charlo for all the belts with the title of interim WBO super welterweight champion at stake in Sunday’s fight.

Here’s everything you need to know.

How to watch

The event will be broadcast in Australia live and exclusive on Main Event via Foxtel and Kayo from 12pm AEDT Sunday. You can order the fight on Foxtel (at mainevent.com.au) or Kayo and no subscription is required for the latter.

The prelims will be aired live and exclusive on Fox Sports and Kayo from 10am AEDT.

You can also watch the fight at any of the venues around the country showing Main Event or attend the event at Sydney’s Qudos Bank Arena (tickets available here).

What time does it start and when will the main event happen?

The five-fight main card (below) begins at midday AEDT, with prelims from 10am. How those fights play out will determine when Tszyu and Harrison take the ring but it’s expected to be around 3pm AEDT.

Tale of the tape

Tim Tszyu

Hometown/nationality: Sydney, Australia

Age: 28

Wins: 20

Losses: 0

Draws: 0

KOs: 15

Stance: Orthodox

Height: 175cm

Reach: 179cm

Tony Harrison

Hometown/nationality: Detroit, Michigan, USA

Age: 32

Wins: 28

Losses: 3

Draws: 0

KOs: 21

Stance: Orthodox

Height: 185cm

Reach: 194cm

Odds (via TAB)

Tim Tszyu $1.37, Tony Harrison $3.10

Tszyu has been the firm betting favourite but there has been some late money from Harrison, who has shortened in from his earlier price of $3.25

Full card

Main card (from midday AEDT)

Tim Tszyu vs. Tony Harrison — 12 rounds, super welterweight – interim WBO super welterweight title

Paulo Aokuso vs. Yunieski Gonzalez — 10 rounds, light heavyweight – vacant IBO Intercontinental light heavyweight title

Sam Goodman vs. TJ Doheny — 10 rounds, super bantamweight – WBO ‘Oriental’ super bantamweight title

Issac Hardman vs. Rohan Murdock — 10 rounds, super middleweight – vacant IBF Australasian super middleweight title

Nikita Tszyu vs. Bo Belbin — 6 rounds, super welterweight

Prelims (underway)

Koen Mazoudier vs. Ben Mahoney — 10 rounds, super welterweight – WBA Oceania super welterweight title

Shanell Dargan vs. Courtney Martin — 4 rounds, featherweight

Imam Khataev def. Gi Sung Gwak by KO, 2nd round— 8 rounds, light heavyweight