George Kambosos Jr vs Devin Haney, billed as Undisputed, was a lightweight unification professional boxing match contested between WBA (Super), IBF, WBO, and The Ring champion, George Kambosos Jr, and WBC champion, Devin Haney.

Haney defeated Kambosos via unanimous decision to become the first undisputed lightweight champion since Pernell Whitaker in 1990, and the first in the four-belt era.

In one of the biggest upsets of 2021, Kambosos Jr defeated López via split decision, winning the unified lightweight titles in the process.

However, there was another man in the lightweight division looking for Kambosos Jr's titles: Vasiliy Lomachenko, who defeated Richard Commey on 11 December in New York.

[7] On 20 March, Lomachenko was given permission to leave Ukraine in order to start training for a potential bout with Kambosos Jr.