![Boxer Christina Hammer is seen during the official Weight-In in Brno Modrice, Czech Republic on April 4, 2012. (CTK Photo/Igor Sefr Stock Photo - Alamy Boxer Christina Hammer is seen during the official Weight-In in Brno Modrice, Czech Republic on April 4, 2012. (CTK Photo/Igor Sefr Stock Photo - Alamy](https://c8.alamy.com/comp/CAP6HC/boxer-christina-hammer-is-seen-during-the-official-weight-in-in-brno-CAP6HC.jpg)
Boxer Christina Hammer is seen during the official Weight-In in Brno Modrice, Czech Republic on April 4, 2012. (CTK Photo/Igor Sefr Stock Photo - Alamy
![Claressa Shields unifies middleweight titles, then calls out Savannah Marshall | Boxing | The Guardian Claressa Shields unifies middleweight titles, then calls out Savannah Marshall | Boxing | The Guardian](https://i.guim.co.uk/img/media/da95adb3edba93d2fdd7a40dc38defde3bc34be9/222_606_4235_2541/master/4235.jpg?width=1200&height=1200&quality=85&auto=format&fit=crop&s=46dd0cbb82f7950814221397b1c1f3ad)
Claressa Shields unifies middleweight titles, then calls out Savannah Marshall | Boxing | The Guardian
![Magdeburg, Germany. 28th Feb, 2014. German boxer Christina Hammer poses during the official weighing in Magdeburg, Germany, 28 February 2014. The current WBO and WBF world champion is to defend her title Magdeburg, Germany. 28th Feb, 2014. German boxer Christina Hammer poses during the official weighing in Magdeburg, Germany, 28 February 2014. The current WBO and WBF world champion is to defend her title](https://c8.alamy.com/zooms/6/adb8e0a77725481bb4571099bbbc7a00/dw5pak.jpg)
Magdeburg, Germany. 28th Feb, 2014. German boxer Christina Hammer poses during the official weighing in Magdeburg, Germany, 28 February 2014. The current WBO and WBF world champion is to defend her title
![Hallandale Beach, Florida, USA. 12th Dec, 2016. Christina Hammer attends the 54th Annual WBC Convention held at The Diplomat Resort & Spa on December 12, 2016 in Hallandale Beach, Florida. Credit: Mpi04/Media Hallandale Beach, Florida, USA. 12th Dec, 2016. Christina Hammer attends the 54th Annual WBC Convention held at The Diplomat Resort & Spa on December 12, 2016 in Hallandale Beach, Florida. Credit: Mpi04/Media](https://c8.alamy.com/comp/HDN475/hallandale-beach-florida-usa-12th-dec-2016-christina-hammer-attends-HDN475.jpg)