Mackenzie Dern faced Virna Jandiroba in the UFC 321 co-main event with the vacant women's strawweight championship on the line. She defeated Jandiroba via unanimous decision to capture the women's 115-pound championship. Look back at Dern's championship performance. Dern puts her belt on the line for the first time in the UFC 330 co-main event on Aug. 15 against fellow submission specialist Gillian Robertson.