One of the coldest one-punch KOs ever caught on camera 🥶 In their 2010 rematch, Sergio Martinez delivered a picture-perfect left hand in Round 2 that knocked Paul Williams out cold — mid-punch, mid-motion, and mid-air. Williams never saw it coming. This wasn’t just revenge — it was art. A walk-off knockout that instantly became part of boxing’s highlight reel forever. Follow BoxingDecades for more iconic knockouts that shook the sport to its core 🥊 #SergioMartinez #PaulWilliams #OnePunchKO #KnockoutOfTheYear #BoxingHistory #MiddleweightBoxing #ColdKO #MartinezWilliams #BoxingHighlights #LegendaryKO #BoxingDecades #SouthpawPower