For example: Terence Crawford

Tyson Fury

United Kingdom

Heavyweight (Unlimited)

Otto Wallin

Sweden

Heavyweight (Unlimited)

Errol Spence Jr

USA

Welterweight (147 lbs)

Shawn Porter

USA

Welterweight (147 lbs)

Gennady Golovkin

Kazakhstan

Middleweight (160 lbs)

Sergiy Derevyanchenko

Ukraine

Middleweight (160 lbs)

Oleksandr Usyk

Ukraine

Cruiserweight (200 lbs)

Tyrone Spong

Netherlands

Heavyweight (Unlimited)

Oleksandr Gvozdyk

Ukraine

Light Heavyweight (175 lbs)

Artur Beterbiev

Russia

Light Heavyweight (175 lbs)

Vasiliy Lomachenko

Ukraine

Super Featherweight (130 lbs)

Luke Campbell

United Kingdom

Lightweight (135 lbs)

Sergey Kovalev

Russia

Light Heavyweight (175 lbs)

Anthony Yarde

United Kingdom

Light Heavyweight (175 lbs)

Adam Kownacki

Poland

Heavyweight (Unlimited)

Chris Arreola

USA

Heavyweight (Unlimited)

Donald Cerrone

USA

Welterweight (170 lbs)

Justin Gaethje

USA

Lightweight (155 lbs)

Khabib Nurmagomedov

Russia

Lightweight (155 lbs)

Dustin Poirier

USA

Lightweight (155 lbs)

Rafael Dos Anjos

Brazil

Welterweight (170 lbs)

Leon Edwards

United Kingdom

Welterweight (170 lbs)

Amanda Nunes

Brazil

Women's Bantamweight (135 lbs)

Holly Holm

USA

Women's Featherweight (145 lbs)