Eddie Hearn revealed Josh Warrington broke his jaw during his victory over Kiko Martinez.
Warrington defeated Martinez in the seventh round on Saturday, to the delight of a partisan crowd in Leeds.
With that victory, his first since October 2019, Warrington regained the IBF featherweight title that he vacated in 2021.
While Warrington's win was a convincing one, it did not come easy, and promoter Hearn confirmed the 31-year-old had sustained an injury.
"Confirmed from the hospital @J_Warrington clean break of his jaw prior to stopping Kiko Martinez to win the World title tonight," wrote Hearn in a post on his official Twitter account, with the caption shared along with a photo of an x-ray of Warrington's jaw.
Warrington has options for his next fight. An all-British showdown with Leigh Wood has been mooted and unification fights with WBC title-holder Mark Magsayo or WBO champion Emanuel Navarrete are also on the table.