Photos: Usyk Goes Heavyweight, Stops Witherspoon - HUGE Gallery

In front of a packed crowd of 9,073 at the Wintrust Arena in Chicago, former undisputed cruiserweight world champion Oleksandr Usyk (17-0, 12 KOs) turned in a commanding performance in his first professional fight in the heavyweight division. Usyk notched a technical knockout victory at the end of the seventh round over the battle-tested Chazz Witherspoon (38-4, 29 KOs). (photos by Ed Mulholland)

In the co-main event of the evening, Russia’s Dmitry Bivol (17-0, 11 KOs) made the sixth successful defense of his WBA World Light Heavyweight Title with a dominating unanimous decision victory over Lenin Castillo (20-3-1, 15 KOs).

Earlier in the evening, Otha Jones III (4-0, 1 KO) bested Eric Manriquez (7-9-1, 3 KOs) via majority decision in a tight four-round affair. Chicago’s Jessica McCaskill (8-2, 3 KOs) successfully defended her WBC and WBA World Female Super Lightweight titles in front of her hometown crowd with a majority decision victory over Erica Farias (26-4, 10 KOs).

Arthur Biyarslanov (5-0, 4 KOs) bested Tyrome James (4-6-1, 1 KO) via unanimous decision in a back-and-forth affair which tested the mettle of the young prospect out of Toronto. Anthony Sims, Jr. (20-0, 18 KOs) extended his perfect record with a sixth-round knockout victory over Morgan Fitch (19-4-1, 8 KOs). In the first fight of the night on DAZN, Charles Conwell (11-0, 8 KOs) stopped Patrick Day (17-4-1, 6 KOs) in the 10th round.