Daniel Dubois Splits with Don Charles, Teams Up with Tony Sims

A Pattern of Change

Dubois’ decision to leave Charles who joined his team before the 2023 title clash with Usyk is particularly high profile. Under Charles’ guidance, Dubois rebuilt his career after setbacks and notched some of his most impressive victories. Wins over Jarrell Miller, Filip Hrgovic, and Anthony Joshua in succession elevated him to the IBF championship and briefly placed him among the heavyweight elite.

But Usyk, holding the WBA, WBO, and WBC belts, loomed as the defining challenge once again. Their rematch at Wembley ended in another fifth-round defeat for Dubois, intensifying questions about his consistency and preparation. Reports of a fight-day party hosted by his family only fueled concerns about discipline and the culture around the fighter.

The Shortcomings Under Charles

Against Usyk, Dubois was telegraphing his punches, failing to follow through with proper fundamentals, and frequently lunging forward a dangerous combination against a fighter as technically sharp and composed as the Ukrainian. Those mistakes played directly into Usyk’s strengths. The pound-for-pound No. 1 needed no invitation to counter, break Dubois’ rhythm, and ultimately close the show with a knockout.

Rather than being equipped with the tools to test the champion, Dubois’ lack of refinement made Usyk’s job easier. For a fighter of his talent and physical gifts. It was a performance that raised more questions about his preparation than his potential.

A Fighter at a Crossroads

Alongside the split with Charles, Dubois has also parted ways with assistant trainer Kieran Farrell and brought in Sam Jones as an advisor. These moves further underline the turbulence surrounding his career.

Now under the guidance of Sims, Dubois faces a critical chapter. At just 27, his best years may still be ahead of him. But with four trainers in less than five years, the need for stability has never been greater.