Mike Tyson may be arguably the most fearsome boxer to ever step foot in the ring, but he ranks only fifth in the list of the biggest heavyweight punchers of all time.
The former undisputed world champion - dubbed 'The Baddest Man on the Planet' - is still the youngest ever boxer to win a heavyweight title, doing so aged 20.
But Iron Mike's punching power pales in comparison to that of some of today's leading heavyweights, according to a study by William Hill.
The bookmakers analysed data going back to 1962 to determine which fighter had the best knockout ratio in the sport's recent history.
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