The Charlos vs. Derevyanchenko and Rosario (also known as the Charlo Doubleheader VIII for the eighth series of both fights involved the Charlo twins (Jermell and Jermall) respectively), was the double-header light middleweight and middleweightprofessional boxing matches contested for the WBC middleweight title between defending undefeated world champion Jermall Charlo and the three-time world title challenger Sergiy Derevyanchenko, as well as the unified light middleweight titles bout between WBC champion Jermell Charlo and unifiedWBA (Super) and IBF champion Jeison Rosario. The event took place on September 26, 2020 at the Mohegan Sun Arena, Uncasville, Connecticut.[1]