When Anthony Joshua made his professional debut against Emmanuel Leo in 2013, fresh from Olympic gold in London, the boxing world treated it like the start of a coronation.

At roughly the same time, a 16-year-old prankster from Ohio named Jake Paul was posting six-second Vine videos - chatting to pineapples in supermarkets and climbing into strangers’ shopping trolleys for a laugh.

More than a decade later, through wildly different routes, the pair have arrived at the same place.

This Friday, in Miami, they will share a ring in a professional heavyweight contest that still feels faintly unreal.