Boxing: Joshua back to his best with KO win over Wallin, Parker overpowers Wilder in Riyadh

British heavyweight Anthony Joshua rolled back the years to dominate Otto Wallin during the Day of Reckoning: Fight Night at Kingdom Arena in Riyadh, Saudi Arabia on Sunday, with the Swede's corner stopping the fight in the break between the fifth and sixth rounds.

With football star Cristiano Ronaldo sitting ringside alongside former Ultimate Fighting Championship (UFC) champion Conor McGregor, the two heavyweights entered the ring well after 2 a.m. local time and Joshua immediately got to work, landing jabs and straight right hands on the southpaw Swede.

Joshua, a two-time unified heavyweight champion, dictated the fight from the center of the ring, forcing his opponent to circle on the outside where Wallin struggled to land any offense.

Joshua, who twice beat Wallin on points as an amateur, hurt Wallin in the fifth, throwing thunderous hooks with both hands to leave the Swede unsteady on his feet as he headed back to his corner, and he never re-emerged as his team told the referee he could not continue.

Improving his record to 27 wins and three losses, the 34-year-old Joshua said he was delighted with the result but declined to say that he was back to his old self.

"I respect Otto. Throughout the whole build-up, I was telling everyone I need to focus on the man in front of me, because I respect what he's bringing to the table," Joshua said in the ring after the fight.

"Not so much a throwback fight. Just another day in the office."

The stoppage was the first in Wallin's professional career and only his second loss, following a defeat by Tyson Fury in September 2019.

In the co-main event, New Zealand heavyweight Joseph Parker put on a brilliant disciplined display to pull off a sensational unanimous decision win over American Deontay Wilder.

After a cautious opening, both fighters landed big right hands in the fourth round, but Parker continued to dictate the pace, controlling the center of the ring and landing jabs and occasional power shots to score.

Fighting for the first time in more than a year, 38-year-old Wilder struggled to land with his usual power and instead Parker pummeled him in the corner towards the end of the eighth round, almost forcing the stoppage.

That onslaught slowed American Wilder considerably but Parker, who held the WBO heavyweight title from 2016 to 2018, continued to box clever.

The three judges scored the fight 118-111, 118-110 and 120-108 for the 31-year-old Kiwi, leaving Wilder's dream of fighting for another world title in tatters.

(With input from Reuters)