@world_boxing_history on Instagram: "🥊 The legendary moment: when Henry Cooper sent Ali to the ground June 18, 1963, Wembley Stadium, London. Cassius Clay – later Muhammad Ali – was undefeated, confident and noisy. Henry Cooper was a British fighter with the only weapon known to the entire boxing world: the left hook – “Enry’s ’Ammer”. At the end of the 4th round, Cooper hit Clay with exactly this punch. Ali fell to the floor. It was one of the few official knockdowns in Ali’s entire career and