Deontay Wilder suffers another loss as Queensberry sweep Matchroom in Saudi Arabia

Former heavyweight world champion Deontay Wilder looks set to retire from boxing after suffering a devastating knockout defeat to Zhilei Zhang in the main event of the Matchroom Boxing vs Queensberry Promotions event in Saudi Arabia.

The unique concept, which saw Matchroom's Eddie Hearn put five of his fighters up against Frank Warren's Queensberry stable in a team format, was swept by the Queensberry boxers, who won all five bouts.

The event was headlined by the heavyweight clash between Wilder and Zhang, and the once formidable 'Bronze Bomber' again looked a shadow of his former self. The American, who was dominated by Joseph Parker in his last fight in December, crashed to the canvas after being caught by a punishing right from Zhang in the fifth round and was counted out.

It was Wilder's fourth defeat in his last five fights and surely spells the end of a career that saw the Alabaman reign as the WBC champion for five years.

"I would like to thank every friend who came here over the world and fans in China, it is midnight there and you are watching me," Zhang, who lost his WBO interim champion status to Parker in his last fight, told DAZN.

"I lost to [Joseph] Parker, it was a fair loss. He was the better man that night. I've learned since then. As long as the bell doesn't ring, stay focused.

"I have to pretend Wilder didn't have a right hand and I successfully took it away. Wilder punches hard, I give him a lot of respect."

That fight was preceded by another major heavyweight bout as Britain's Daniel Dubois caused a minor upset to hand Croatian Filip Hrgovic his first professional defeat to claim the IBF's interim champion belt.

Referee John Latham intervened 57 seconds into the eighth round on doctors' advice at