FLOYD MAYWEATHER JR.'s record of 50 wins with zero losses automatically makes him one the greatest ever.
However, not even the greatest American can compare his record with that of Julio Cesar Chavez, the Mexican legend.
Mexican legend Julio Cesar Chavez won 89 fights with no loss
It was however an Englishman who holds an unmatched record. SunSport has compiled a list with the longest undefeated streaks in boxing.
10: Rocky Marciano 49-0
Rocky Marciano is now part of a rare group of boxers who have finished their careers undefeated.
The heavyweight fought professionally between 1947 and 1955, and was crowned champion in 1952.
Marciano's most memorable wins were against Joe Walcott, Joe Louis, Joe Louis, and Archie Moore.
He was nicknamed The Rock of Brockton and defended his belt six more times before he retired at 32.
Marciano has an unblemished professional record of 43 wins by knockout in eight years.
BoxRec has ranked Marciano as the fourth greatest heavyweight fighter in history.
Marciano, who was 46 years old, died in a small plane crash that occurred shortly after takeoff on August 31, 1969.
9: Andre Ward: 32-0
Andre Ward, a San Francisco native, shocked the boxing world in 2017 when he announced that he was retiring from the sport.
Ward, 33 years old, said that he was leaving the sport because his body is unable to withstand the demands of the sport. Therefore, my desire to fight has diminished.
"If I can't give my family, my teammates, and the fans all that I have, then I shouldn't be fighting."
Ward fought 13 years in super middleweight and light weight divisions. He won world titles in both of these classes.
He defeated Sergey Kovalev twice in his last fight to keep his WBA, IBF, and WBO light-heavyweight titles.
8: Larry Holmes: 669
Larry Holmes is perhaps the greatest heavyweight champion of all time.
Holmes was 48-0 in his career, and he retired with a record of 6-9.
Holmes competed between 1973 and 2002.
He was nicknamed "The Easton Assassin" and held the WBC Heavyweight title between 1978 and 1983.
Holmes was able to defend his titles against 19 other opponents during his career before losing to Michael Spinks in 1985.
In 1988 and 1992, he had notable fights with Evander Holyfield and Mike Tyson.
He defeated Eric Esch in a 10-round unanimous decision on July 27, 2002 in Norfolk, Virginia.
7: Willie Pep: 285-17
From 1940 to 1966, Willie Pep was a professional athlete.
Before losing his first fight against Sammy Angott, he boasted a 62-0 record.
Pep won his 72nd fight to reaffirm his status as the greatest featherweight ever.
Pep fought until his 40s, adapting his style to be more defensive.
He won 285 and lost 17.
6: Carlos Monzon: 87-3
Carlos Monzon, a young fighter, lost three fights in 1963 while still competing in Argentina.
In October 1964, he had a 16-3 record and would never again experience defeat.
He was a star in South America, and a highly respected champion all over the globe.
Monzon, also known as Escopeta or shotgun, fought as a middleweight until he retired in 1977 as the undisputed champion.
5: Roberto Duran: 103-16
Roberto Duran's streak of unbeaten was one of the longest, but he had a second remarkable winning streak like Willie Pep.
Duran, also known as Manos de Piedra or Hands of Stone was a competitor in seven weight classes from 1968 to 2001.
After 31 victories, he lost to Esteban de Jesus, a Puerto Rican fighter in 1972.
Duran lost his first fight, but he won the next 41 fights. He was then defeated by Sugar Ray Leonard in 1980.
Manos de piedra would be regarded as the greatest lightweight boxer in boxing history.
Before moving up to welterweight, he was the dominant pound-for pound fighter in the 1970s.
Duran's 2001 career was completed by his fight against Hector Camacho. He lost unanimously.
Duran finished his professional career with a record of 103-16.
4: Floyd Mayweather Jr.: 50-0
Floyd Mayweather Jr. is one of only 15 boxers to retire from the sport with an unbeaten record.
Mayweather won 15 major titles during his career, competing in five weight divisions. He also has a perfect record of 50-0.
Mayweather, also known as Money, is often called the greatest defensive boxer ever.
Mayweather fought some of sport's greatest from 1996 to 2017.
After beating Conor McGregor, UFC star, he decided to retire as a professional fighter.
Mayweather can still fight in lucrative exhibition bouts, where he can make a lot of money without losing his unbeaten streak.
After previously KOing Tenshin Nasukawa in Tokyo, 2018, he will now step into the ring alongside Logan Paul on YouTube to claim PS7m.
3: Sugar Ray Robinson: 173-19
Sugar Ray Robinson was the dominant boxer in the forties and fifties.
Robinson lost his first match against Bronx Bull Jake LaMotta, after he had gone 40-0. This was in February 1943.
Robinson won the next 88 fights after the defeat, before Randy Turpin upset him in July 1952.
Robinson won the welterweight title and the middleweight title during that streak.
Robinson competed in four weight divisions from 1940 to 1965 and finished his career with a 173-19 record.
2: Julio Cesar Chavez: 107-6
Julio Cesar Chavez's dominating start to a professional career in boxing was undoubtedly the best. He won his first 89 fights.
From 1980 to 2005 Chavez competed at four weight divisions and won six world titles.
With 27 total title defense victories, Chavez holds the record. He also holds the record with 31 title fight wins.
In 1994, Frankie Randall was his first professional loss.
BoxRec has ranked Chavez as the 18th greatest boxer of all-time, pound for pound.
He is ranked 24th on ESPN's Top 50 Greatest Boxers of All Time, and 18th on The Ring’s Top 80 Best Fighters of The Last 80 Years.
The Mexican retired with a record of 107-6.
1: Jimmy Wilde: 133-2
Jimmy Wilde defeated Ted Roberts in three rounds of professional boxing in 1911.
This would mark the beginning of the greatest boxing start in history.
Wilde would fight 28 times in 1911 and finish the year with a record of 27-0-1.
He had already set the record for the longest unbeaten boxing record of 93-0-1 by the end of 1914. This record is still in existence today.
The Englishman was the first world champion in the flyweight division.
Wilde remained undefeated in boxing for four years until Tancy Lee gave Wilde his first loss in professional boxing by way of a TKO in round 17.
Wilde participated in 136 fights. He won 132 of them and lost three.
