Karolina Kowalkiewicz is a KSW champion in up to 52 kg category from 2013. In 2015 she transferred to UFC and won amongst Canadian Randa Markos in her debut fight. In 2016 she took part in a historical event at Madison Square Garden, where fighters from Europe were fighting for the title. Kowalkiewicz was in the ring with Joanna Jędrzejczyk. In 2017 one of the best world MMA fighters in her class together with her team, Shark Top Team, opened a martial arts club in Łódź.