Vitali Klitschko is known for his formidable punching power, resilience, and strategic approach in the ring.

He holds a PhD in Sports Science, earning him the nickname "Dr. Ironfist."

Klitschko had an extensive amateur career, with a record of 195 wins out of 210 bouts, and was a six-time kickboxing world champion before turning to professional boxing.

After retiring from boxing, Klitschko transitioned into politics and has been serving as the Mayor of Kyiv, Ukraine, since 2014.

Throughout his career, Klitschko maintained a high knockout-to-win ratio and was never knocked down or out in any of his professional fights.

WBO Heavyweight Champion (1999–2000)

WBC Heavyweight Champion (2004–2005, 2008–2013)

The Ring Magazine Heavyweight Champion (2004–2005)

First professional boxing world champion to hold a PhD

Along with his brother Wladimir, holds the record for most world heavyweight title fight wins by brothers

Vs. Herbie Hide (June 26, 1999): Won by KO in the 2nd round to claim the WBO Heavyweight title.

Vs. Chris Byrd (April 1, 2000): Lost by RTD in the 9th round due to a shoulder injury, marking his first professional defeat and loss of the WBO title.

Vs. Lennox Lewis (June 21, 2003): Lost by TKO in the 6th round due to severe cuts, in a bout for the WBC, IBO, and The Ring Heavyweight titles; Klitschko was ahead on all scorecards at the time of stoppage.

Vs. Corrie Sanders (April 24, 2004): Won by TKO in the 8th round, securing the vacant WBC and The Ring World Heavyweight titles.

Vs. Samuel Peter (October 11, 2008): Won by RTD after the 8th round, regaining the WBC Heavyweight title after a four-year hiatus from boxing.