The World Boxing Super Series offers fans a unique bracket format typically unseen in the sport. 

The WBSS is in its inaugural season with divisions in the super middleweight and cruiserweight classes. After starting in Sept. 2017, both weight classes were whittled down to quarterfinal matchups, with the the winner of each matchup advancing for a chance to win the Muhammad Ali Trophy.

Season 2, which will be shown on DAZN, begins in September and will feature the super middleweight and cruiserweight classes, plus an additional class. DAZN will show all 15 fight nights of Season 2 in the U.S., featuring 21 matches across the three tournaments. Check back for more information as that becomes available. 

As for Season 1, both divisions have just their championship fights remaining, but let's take a look at how each matchup was formed:

Season 1

Super middleweight

Quarterfinals: 

Sept. 17, 2017: Echo Arena, Liverpool, England — Callum Smith def. Erik Skoglund (Unanimous decision)

Oct. 7, 2017: Hanns-Martin-Schleyer-Halle, Stuttgart, Germany — Chris Eubank Jr. def. Avni Yildirim (Third round KO)

Oct. 14, 2017: Wembley Stadium, London — George Groves def. Jamie Cox (Fourth round KO)

Oct. 27, 2017: Sport-und Kongresshalle, Schwerin, Germany — Jurgen Brahmer def. Robert Brant (Unanimous decision)

Semifinals: 

Feb. 17, 2018: Manchester Arena, Manchester, England — George Groves def. Chris Eubank Jr. (Unanimous decision)

Feb. 24, 2018: Arena Nurnberger Versicherung, Nurnberg, Germany — Callum Smith def. Nieky Holzken (Unanimous decision)

Finals:

George Groves vs. Callum Smith, date and location TBA (Fight will be in September)

Cruiserweight

Quarterfinals: 

Sept. 9, 2017: Max-Schmeling-Halle, Berlin, Germany — Oleksandr Usyk def. Marco Huck (10th round TKO)

Sept. 23, 2017: Alamodome, San Antonio — Yunier Dorticos def. Dmitry Kudryashov (Second round KO)

Sept. 30, 2017: Arena Riga, Riga, Latvia — Mairis Briedis def. Mike Perez (Unanimous decision)

Oct. 21, 2017: Prudential Center, Newark — Murat Gassiev def. Krzysztof Włodarczyk (Third round KO)

Semifinals: 

Jan, 27, 2018: Arena Riga, Riga, Latvia — Oleksandr Usyk def. Mairis Briedis (Majority decision)

Feb. 3, 2018: Bolshoy Ice Dome, Sochi, Russia — Murat Gassiev def. Yunier Dorticos (12th round TKO)

Finals:

July 21: Olympic Stadium, Moscow, Russia — Oleksandr Usyk vs. Murat Gassiev

Season 2

Seedings for the second season were announced on July 20, which will feature a bantamweight and super-lightweight division. 

Matchups were also announced after the draft, with dates and locations to be announced as a later date. They are as follows:

Bantamweight

Quarterfinals:

No. 1 seed Ryan Burnett vs. Nonito Donaire

No. 2 seed Naoya Inoue vs. Juan Carloa Payano

No. 3 seed Zolani Tete vs. Mikhail Aloyan

No. 4 seed Emmanuel Rodriguez vs. Jason Moloney

Super lightweight

Quarterfinals:

No. 1 seed Regis Prograis vs. Terry Flanagan

No. 2 seed Josh Taylor vs. Ryan Martin

No. 3 seed Kiryl Relikh vs. Eduard Troyanovsky

No. 4 seed Ivan Baranchyk vs. Anthony Yigit

Cruiserweight

No. 1 seed Mairis Briedis vs. Noel Mikaelian 

No. 2 seed Yunier Dorticos vs. Mateusz Masternak 

No. 3 seed Krzysztof Glowacki vs. Maksim Vlasov 

No. 4 seed Ruslan Fayfer vs. Andrew Tabiti (16-0, 13 KOs)