Undefeated WBO and WBC middleweight champion Christina Hammer joined some illustious company in her American television debut on the co-main event of Shobox. With her one sided win over former champion Tori Nelson, Hammer became the first  German fighter to successfully defend a world title in the US since Max Schmeling successfully defended his heavyweight title in 1931 against Young Stribling at Municipal Stadium in Cleveland, Ohio. Hammer's next fight is expected to be a full unification of the middleweight division against undefeated two time gold medallist and current WBA and IBF middleweight champion Claressa Shields, in what could be the biggest fight in the history of women's boxing.