The fighters:

Konstantin Borisovich “Kostya” Tszyu is a Russian-Australian former professional boxer who competed from 1992 to 2005. He is a two-time light welterweight world champion, having also held the undisputed and lineal titles of that division from 2001 to 2003. Tszyu was an exceptional all-around boxer-puncher who relied heavily on accuracy and timing, and carried formidable punching power; he is often regarded as one of the hardest-punching light welterweights in the division’s history.

Rico Verhoeven is a Dutch kickboxer and current Glory Heavyweight Champion. He has also competed in the K-1, It’s Showtime and SUPERKOMBAT promotions.

Muhammad Ali was an American professional boxer and activist. He was widely regarded as one of the most significant and celebrated sports figures of the 20th century. From early in his career, Ali was known as an inspiring, controversial, and polarizing figure both inside and outside the ring.

Tyson Luke Fury is a British professional boxer who has held the Ring magazine and lineal heavyweight titles since November 2015, after defeating long-reigning world champion Wladimir Klitschko. In the same fight, Fury also won the WBA (Super) (later promoted to Unified status), IBF, WBO, and IBO titles, with the victory earning him Fighter of the Year and Upset of the Year awards by The Ring.

Conor Anthony McGregor is an Irish professional mixed martial artist and is the current UFC Featherweight Champion. Throughout his career, he has competed as a featherweight, lightweight and welterweight.