Mayweather, Calzaghe, Adams: 21 boxers who retired undefeated champions

Boxing is a sport that has provided entertainment to the world for centuries.

Over the many years, it has produced countless legendary fighters who have gone down in history for their magnificent achievements.

But since the first world championship was won, only 21 fighters have retired undefeated with their belts around their waists.

Here’s every single professional boxing world champion who hung up their gloves without a single loss on their record.

A key figure in changing the landscape of women’s boxing. Michele Aboro retired as the undefeated WIBF super-bantamweight champion in 2001.

After becoming the first ever female Olympic boxing champion, Nicola Adams turned professional and won the WBO flyweight title. She was forced to retire in 2019 due to the risk of permanent vision loss.

The daughter of Muhammad Ali retired as the WBC, WIBA, IWBF and IBA female super middleweight champion and IWBF light heavyweight champion.

Laila also marked her name in history by fighting Joe Frazier’s daughter Jacqui in the first female main-event pay-per-view match.

Jimmy Barry held the world bantamweight championship from 1894 to 1899 and was undefeated in 70 professional bouts.

The Pride of Wales held world championships in two weight classes and remains the longest reigning super-middleweight world champion in boxing history.

Calzaghe held the WBO belt for more than 10 years and defended it on 20 occasions, a division record shared with Sven Ottke.

Kim Ji-won retired in 1986 as the undefeated super bantamweight champion. The South Korean fighter hung up his gloves in order to pursue a career in theatrical acting and singing.

Romanian fighter Mihai Leu was forced to step away from the ring in 1997 due to injury. He retired as the