fistic
adjective
fist·ic ˈfi-stik 
: of or relating to boxing or to fighting with the fists
fistic prowess
Example Sentences
Recent Examples on the Web His style is more along the lines of Floyd Mayweather Jr. — avoid contact, make the opponent look bad and win on points — which, to fans who thrive on continuous action and massive fistic exchanges, does not sit well. 
Bob Velin, USA TODAY, 8 Dec. 2017 Joshua has both the fistic force and the personality, a breath of fresh air for both the sport and its cadre of big men. Martin Rogers, USA TODAY, 29 Apr. 2017
Bob Velin, USA TODAY, 8 Dec. 2017 Joshua has both the fistic force and the personality, a breath of fresh air for both the sport and its cadre of big men. Martin Rogers, USA TODAY, 29 Apr. 2017 Word History
First Known Use
1806, in the meaning defined above