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Anthony Joshua will continue his quest to become a three-time world heavyweight champion when he takes on Otto Wallin later this month.
The Brit will battle the talented southpaw on the same card as Deontay Wilder against Joseph Parker in Saudi Arabia on December 23.
The fight will be the toughest test yet on Joshua's comeback trail, following comfortable victories against Jermaine Franklin and Robert Helenius.
While Wallin, who boasts a record of 26-1, is coming off impressive wins over fighters like Murat Gassiev and Dominic Breazeale.
Furthermore, he is a southpaw, just like Oleksandr Usyk, and together with the Ukrainian's speed and intelligence, Joshua looked incredibly uncomfortable against his stance.
The 34-year-old will compete against the Swede Otto Wallin (right) in the Saudi capital.
Wallin inflicted major damage on Tyson Fury with a unanimous decision loss in 2019, the only defeat on his record
Jarrell Miller believes Joshua made a mistake in choosing the Swede for his next match
As a result, Jarrell Miller, who was scheduled to fight Joshua in 2019 before testing positive for multiple banned substances, believes the 34-year-old may have made a blunder by agreeing to face the Swede.
'I honestly think so [Joshua] “Maybe he made a mistake in choosing Otto Wallin,” the American said SecondsOff.
“Even though Otto Wallin is not a one-punch knockout guy, he is durable, he comes to fight, he is not a quitter and it will be a tough fight for [Joshua]. I don't think it will be easy at all.
“The mental mind says that [Joshua]has, will he last?
'If he fights in Britain he'll have a bit more pep in his step, but if he fights outside Britain we won't get the same fiery person, the playing field will be a bit more even in Saudi Arabia.
'I wish Otto Wallin good luck, I really want to be the one who gets knocked out [Joshua]but may the best man win, it is what it is.”
Miller and Joshua have been embroiled in a bitter feud since their fateful clash. The pair almost came to blows during the press conference event for 'Day of Reckoning', which will also feature the American's fight with Daniel Dubois.