The 26-year-old takes on Sergey Kovalev at the Motorpoint Arena on 17th August and showed off his sparring skills for fans in Queen Street.
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Feeling humid with heavy showers and thunderstorms moving north overnight into Sunday.
Four people, including three children, were taken to hospital to be checked for smoke inhalation.
Heavy rain and thunderstorms will affect many parts of Wales this weekend - particularly during Saturday evening.