Ali vs. Foreman — Rumble in the Jungle (1974)

Muhammad Ali's iconic "Rumble in the Jungle" against undefeated George Foreman took place on October 30, 1974, in Kinshasa, Zaire. Ali, a 4-1 underdog against Foreman who had a professional record of 40-0 with 37 knockouts, introduced his innovative "rope-a-dope" strategy. This tactic involved Ali leaning on the ropes, absorbing Foreman's punches to tire him out before securing an eighth-round knockout victory. The upset was witnessed by approximately 60,000 live fans and an estimated one billion television viewers worldwide, making it one of the most-watched live television broadcasts of its era.