![Ukrainian WBA, WBO, IBO and IBF heavyweight boxing world champion Vladimir Klitschko (R) lands a punch during his title fight against challenger Bulgarian heavyweight boxer Kubrat Pulev in Hamburg, November 15, 2014. Ukrainian WBA, WBO, IBO and IBF heavyweight boxing world champion Vladimir Klitschko (R) lands a punch during his title fight against challenger Bulgarian heavyweight boxer Kubrat Pulev in Hamburg, November 15, 2014.](https://c8.alamy.com/comp/2CY00R0/ukrainian-wba-wbo-ibo-and-ibf-heavyweight-boxing-world-champion-vladimir-klitschko-r-lands-a-punch-during-his-title-fight-against-challenger-bulgarian-heavyweight-boxer-kubrat-pulev-in-hamburg-november-15-2014-world-heavyweight-champion-vladimir-klitschko-knocked-out-bulgarian-challenger-kubrat-pulev-with-a-fierce-left-hook-in-the-fifth-round-on-saturday-to-retain-his-ibf-title-and-end-his-opponents-unbeaten-record-reutersfabian-bimmer-germany-tags-sport-boxing-2CY00R0.jpg)
Ukrainian WBA, WBO, IBO and IBF heavyweight boxing world champion Vladimir Klitschko (R) lands a punch during his title fight against challenger Bulgarian heavyweight boxer Kubrat Pulev in Hamburg, November 15, 2014.
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![Ukrainian WBA, WBO, IBO and IBF heavyweight boxing world champion Vladimir Klitschko (L) delivers a punch to his challenger Bulgarian Kubrat Pulev during their title fight in Hamburg, November 15, 2014. World Ukrainian WBA, WBO, IBO and IBF heavyweight boxing world champion Vladimir Klitschko (L) delivers a punch to his challenger Bulgarian Kubrat Pulev during their title fight in Hamburg, November 15, 2014. World](https://c8.alamy.com/comp/2CYT7C2/ukrainian-wba-wbo-ibo-and-ibf-heavyweight-boxing-world-champion-vladimir-klitschko-l-delivers-a-punch-to-his-challenger-bulgarian-kubrat-pulev-during-their-title-fight-in-hamburg-november-15-2014-world-heavyweight-champion-vladimir-klitschko-knocked-out-bulgarian-challenger-kubrat-pulev-with-a-fierce-left-hook-in-the-fifth-round-on-saturday-to-retain-his-ibf-title-and-end-his-opponents-unbeaten-record-reutersmorris-mac-matzen-germany-tags-sport-boxing-2CYT7C2.jpg)