You've probably heard of Tyson Fury, Deontay Wilder, Anthony Joshua and the up-and-coming Andy Ruiz as boxing's most prominent heavyweights. Undoubtedly, these men have shown the world what it takes to be at the top of the sport. 

However, someone is knocking on the door. Otto Wallin might not ring a bell for casual boxing fans, but he vows to get his shot on Sunday against Tyson Fury in Las Vegas, Nevada.

No world title is on the line, but a win against an unbeaten and proven world champion like Fury could put him in the top of the heavyweight division. 

Wallin, a 28-year-old fighter from Sundsvall, Sweden is currently ranked number 4 at the World Boxing Association's list. He will try to make history on Sunday by beating Fury and climbing up the ladder to become the world heavyweight champion. 

Sixty years ago, Ingemar Johansson became the first and only Nordic heavyweight boxer to become world champion. Wallin said that winning against the fast-talking Briton "would be at the same level."

He added that "Fury is the top guy... a world title or not." Wallin spent his career fighting in Europe and has a respectable 20 win record with no losses and 13 coming by KO. 

If you've seen the press conferences, Wallin is the polar opposite of Fury. The Swede pugilist is humble and reserved, a characteristic that's often associated with Nordic people. 

To boost his image in the U.S., the 28-year-old moved to New York but has had trouble adjusting to the different culture. He's pulling an Adam Kownacki move but has failed to get a following after his first fight ended in a no contest. 

He was scheduled to fight BJ Flores in Washington, but it was canceled at the last minute when Flores failed his medical examination. He was picked as Fury's opponent months ago and is lowly considered by a lot of boxing fans. 

Fury is scheduled to a rematch against American Deontay Wilder next year, that is if he gets past the win-hungry Swede. Wallin could look to upset the gregarious Briton. Otto is six-foot-five and prefers to fight in a southpaw stance. 

Moreover, Tyson shouldn't be too complacent if he doesn't want to suffer a fate similar to Anthony Joshua. On June 1, 2019, the former WBA heavyweight champ was beaten by Andy Ruiz, a plump, but very agile Mexican-American heavyweight that packs power in his punches.

On Sunday could witness another upset, or a broken dream dealt by Fury's unbelievable hand speed. For Otto Wallin, it's a now or never chance at boxing stardom. Four days from now, we'll see.