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#1 Wladimir and Vitali Klitschko
The Ukrainian heavyweights Wladimir and Vitali Klitschko were the most dominant heavyweight boxers of the 21st century.
Vitali Klitschko made his professional debut in 1996 and it didn't take long for his presence to be felt in the heavyweight division. He won his first title in 1999 when he fought British heavyweight star Herbie Hide. He knocked out Hide in the second round to win the WBO world heavyweight title.
However, he lost his title in 2000 to American star Christopher Cornelius Byrd. Vitali was dominating the fight for most part but in the ninth round, he tore his rotator cuff and had to retire on the stool. He was ahead on all the judges' scorecards. His second loss came to British boxing superstar Lennox Lewis in 2003, which was the biggest fight of the year. The fight had to be stopped in between rounds six and seven after a cut on Klitschko's right eye. He then went on to dominate all his fights for the remainder of his career and retired in 2012 with a 45-2-0 (41 KOs).
Vitali's younger brother Wladimir was also an exceptionally talented heavyweight boxer. After winning a gold medal at the 1996 Olympics in the super-heavyweight category, Wladimir turned professional almost immediately and quickly rose to the top of the ranks. He won his first world title on 14th October, 2000, when he defeated Chris Bryd via unanimous decision and also avenged his brother's loss to Bryd six months ago.
Klitschko retired in 2017 after losing to British superstar Anthony Joshua in a blockbuster mega event. In that fight, Klitschko was knocked out in the eleventh round. The fight broke British boxing PPV records and it sold a staggering 1.5 Million buys. Wladimir also holds the record for the longest cumulative heavyweight title reign. He remained champion for 4382 days and defeated 23 opponents in the process.
He retired with a record of 64-5-0 (53 KOs).
