Vasiliy Lomachenko has warned Devin Haney he will need to back up his bold talk when the pair clash in their undisputed lightweight title blockbuster this weekend.
The two-time Olympic gold medallist must become the first man to defeat Haney in a professional contest if he is to achieve his ambition of holding the WBA, WBC, WBO and IBF titles simultaneously, in a showdown which is live on Sky Sports.
Undisputed…