Vitali Klitschko (born 19 July 1971) and Wladimir Klitschko (born 25 March 1976), collectively known as the Klitschko brothers are Ukrainian heavyweight boxers. The older brother Vitali retired from boxing in 2013 and became a politician in his native Ukraine. After the retirement of boxing legend Lennox Lewis, the Klitschko brothers held all heavyweight boxing world titles. During their peak years from 2004 until 2015, the Klitschko brothers were considered the most dominant heavyweight champions of their era, and amongst the most successful champions in heavyweight boxing history.
Eventually, Vitali Klitschko retired from boxing in 2013 and is currently the mayor of Kiev in the Ukraine. Upon his retirement, Vitaly relinquished the WBC world heavyweight title. Wladimir Klitschko continued to successfully defend the WBA, IBF, WBO, The Ring and Lineal titles until he was defeated by Tyson Fury in 2015.
Both brothers made their professional debut on November 6, 1996 in Hamburg. Since then both have been heavyweight world champions in boxing. They have stated they will never fight each other because of a promise they made to their mother.
In June 1999, Vitali Klitschko won the WBO Heavyweight title from Herbie Hide via second round knockout. He successfully defended the title twice before losing it to Chris Byrd. Six months later, younger brother Wladimir dethroned Byrd via lopsided points decision. He registered five successful title defenses, all by TKO until suffering an upset TKO loss to Corrie Sanders in March 2003. Vitaly Klitschko lost his fight with Lennox Lewis in his attempt to win the WBC, IBO, The Ring and Lineal Heavyweight Championships.