Lomachenko's status as one of the world's best pound-for-pound talents was enhanced when opponent Jason Sosa failed to emerge for the 10th round of their WBO super-featherweight title fight.
The former amateur prodigy improved to 8-1 as a pro, including world titles in two divisions, as his second consecutive opponent withdrew in the corner. Nicholas Walters previously lost to Lomachenko in the same manner.
