Muhammad Ali vs. Henry Cooper

Muhammad Ali and Henry Cooper fought two boxing matches with each other in London. Their first match took place on 18 June 1963 (before Ali had changed his name from Cassius Clay) and the second on 21 May 1966. Ali won both matches. The first fight was stopped by the referee in the fifth round, and the second in the sixth round. Both fights were stopped after Cooper started bleeding excessively from a cut to the left eye. The first Ali-Cooper bout is remembered for being one of the four fights in which Ali was officially knocked down in the ring by his boxing opponent, as well as leading to the mandate that ringside handlers always have an extra pair of boxing gloves available.