After two back-and-forth rounds, Namajunas was able to secure the victory via submission due to a rear-naked choke in round three.
On July 30, 2016, Namajunas fought at in a match regarded as a title eliminator.
She came in as a big underdog against the undefeated champion.
In the first defense of her title, Namajunas faced Jędrzejczyk in a rematch that took place on April 7, 2018, at.
Namajunas has mentioned being a victim of , while emphasizing that she does not want to speak about specific details.
According to Ansaroff's camp, she contracted the flu the week before, and the weight cut exacerbated the illness, forcing Ansaroff to abandon her weight cut early, and ultimately withdraw from the fight.