Tyson Fury has highlighted Oleksandr Usyk as the biggest threat to his unbeaten record - along with Deontay Wilder .
Fury is expected to brush aside Swedish prospect Otto Wallin on his next appearance in the ring on September 14 before a mouth-watering clash with Wilder early next year.
The pair fought out a controversial draw in December last year with Fury picking himself up of the canvas in dramatic fashion after a big knockdown in the final round.
The feared Wilder offers a tough proposition - but Fury believes another fighter could well be the main threat to his unbeaten record and lineal crown.
He believes former cruiserweight king Usyk, who will make his long-awaited step up to the heavyweight division to fight Tyrone Spong on October 12, could be his biggest test.
Fury snubbed British rival Anthony Joshua and his conquerer, Andy Ruiz Jr, when asked who is the biggest threat in the division by ESPN .
Fury said: “Probably Wilder, I’ve already fought him, I already beat him once.
“So that’s the biggest challenge that they have, I don’t see anybody else being much of a challenge, to be honest.
“Maybe Oleksandr Usyk.
“He’s an awkward-looking guy, southpaw, a unified [cruiserweight] world champion, an undefeated world champion.
“So maybe he can be next, toughest challenge.”
Meanwhile, Anthony Joshua claimed his opponent, Ruiz, is the best in the division ahead of their December rematch in Saudi Arabia.
Speaking at their London press conference on Friday, Joshua said:
Joshua continued: “I’m fighting the best out there right now, and, in my opinion Andy Ruiz is the best heavyweight out there.”
