Oleksandr Usyk v Anthony Joshua 2 full undercard and fight times: Callum Smith, Filip Hrgovic and Badou Jack fighting on Saudi Arabia show

The undercard for the Oleksandr Usyk vs Anthony Joshua rematch is packed.

The Ukrainian and the Brit meet again on Saturday, August 20 - this time in Saudi Arabia - with the WBA, IBF and WBO heavyweight world titles at stake.

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Prior to that though, dangerous Croatian contender Filip Hrgovic will compete to earn the right to become a future challenger.

Highly rated Hrgovic will face China's unbeaten Zhilei Zhang in a final eliminator to determine the IBF's next mandatory.

After the Usyk vs Joshua rematch, it's expected that the WBA could be the next organisation to put forward their mandatory, with the Hrgovic vs Zhang winner then called not long afterwards.

Hrgovic will be a big favourite in the bout as had been largely avoided in the division.

It took a long time to secure him an opponent in this final eliminator, with all other heavyweights in the IBF's top 15 turning down the fight until they reached Zhang who is rated #15.

The pair were initially meant to meet on the undercard of Canelo Alvarez vs Dmitry Bivol back in May, but had to reschedule as Hrgovic's father passed away.

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A second final eliminator on the card sees Callum Smith meet France's Mathieu Bauderlique.

The winner will become the WBC mandatory challenger at light-heavyweight - with the world title currently held by unified WBC, IBF and WBO champion Artur Beterbiev.

Also on the show, Somali-British super-bantamweight prospect Ramla Ali and her opponent Crystal Garcia Nova will become the first female boxers to feature in an official international event in Saudi Arabia.

As well as this, former Floyd Mayweather man Badou Jack will face Richard Rivera in a cruiserweight bout.

And another ex-Mayweather Promotions fighter Andrew Tabiti will take on James Wilson in a heavyweight contest.

Rounding off the action will be Usyk teammate Daniel Lapin in a light-heavyweight bout with Jozef Jurko and Saudi Super-Lightweight prospect Ziyad Almaayouf facing Jose Alatorre.

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Full card:

• Anthony Joshua vs Oleksandr Usyk 2 (10.54pm UK time) - World heavyweight championship WBA 'super', IBF, IBO and WBO - 12 rounds
• Filip Hrgovic vs Zhilei Zhang (9.45pm) - IBF heavyweight final eliminator - 12 rounds
• Callum Smith vs Mathieu Bauderlique (8.30pm) - WBC light-heavyweight final eliminator - 12 rounds
• Badou Jack vs Richard Rivera (7.15pm) - cruiserweight - 10 rounds
• Ziyad Almaayouf vs Jose Alatorre (6.45pm) - super-lightweight - 4 rounds
• Ramla Ali vs Crystal Garcia Nova (6.10pm) - super-bantamweight - 8 rounds
• Andrew Tabiti vs James Wilson (5.24pm) - heavyweight - 8 rounds
• Ben Whittaker vs Peter Nosic (4.46pm) - light-heavyweight - 6 rounds
• Daniel Lapin vs Josef Jurko (4.03pm) - heavyweight - 8 rounds
• Bader Alsamreen vs Faud Tarverdi (3.30pm) - super lightweight - 6 rounds
• Rashed Belhassa aka Money Kicks vs Traycho Georgiev (3pm) - welterweight - 4 rounds