When was Muhammad ali nicknamed the greatest?

Muhammad Ali was famously nicknamed "The Greatest" during the 1960s, particularly after he won the heavyweight title in 1964 by defeating Sonny Liston. The moniker was solidified by his confidence, charisma, and remarkable boxing skills. Ali often referred to himself as "The Greatest," and the phrase became synonymous with his persona both in and out of the ring. His achievements and impact on sports and culture further entrenched this nickname in history.