Dubois dropped Harper with a jab and left hook in the sixth round, then continued to pressure the cut‑ridden opponent until the final bell. Judges scored 98‑91, 97‑92, 98‑91 in Dubois's favour.
The win made Dubois the first woman to hold both WBC and WBO lightweight titles. The bout, held at the historic Olympia in Kensington, marked the first UK event by Most Valuable Promotions in decades.