![Hammer Fitness & Boxing on Twitter: "The man behind our boxing program, retired professional boxer, Johnny Higgins! Work with Johnny in group class and 1-on-1 sessions! Check out our website for details. # Hammer Fitness & Boxing on Twitter: "The man behind our boxing program, retired professional boxer, Johnny Higgins! Work with Johnny in group class and 1-on-1 sessions! Check out our website for details. #](https://pbs.twimg.com/media/DecgSJcWAAEiGWI.jpg)
Hammer Fitness & Boxing on Twitter: "The man behind our boxing program, retired professional boxer, Johnny Higgins! Work with Johnny in group class and 1-on-1 sessions! Check out our website for details. #
![Tony Yoka: French heavyweight retains unbeaten record with unanimous win over Christian Hammer | Boxing News | Sky Sports Tony Yoka: French heavyweight retains unbeaten record with unanimous win over Christian Hammer | Boxing News | Sky Sports](https://e0.365dm.com/20/11/2048x1152/skysports-yoka-hammer-boxing_5187094.jpg)
Tony Yoka: French heavyweight retains unbeaten record with unanimous win over Christian Hammer | Boxing News | Sky Sports
![Yekaterinburg, Russia. 15th Dec, 2017. Romania's boxer Christian Hammer and Russia's boxer Alexander Povetkin in a heavyweight fight, which is an eliminator for the WBO international title and the WBA super champion Yekaterinburg, Russia. 15th Dec, 2017. Romania's boxer Christian Hammer and Russia's boxer Alexander Povetkin in a heavyweight fight, which is an eliminator for the WBO international title and the WBA super champion](https://c8.alamy.com/comp/KPJFB4/yekaterinburg-russia-15th-dec-2017-romanias-boxer-christian-hammer-KPJFB4.jpg)