Angelo Dundee, who is best known for the more than two decades he spent as boxer Muhammad Ali's trainer, died at age 90.

Dundee worked with 15 world champions, including Sugar Ray Leonard, George Foreman and Jimmy Ellis but it is his work with Ali that stands out the most.

Dundee travelled the world with Ali and worked with him in his most famous fights, including The Rumble in the Jungle against Foreman in 1974. Together they crafted the "rope-a-dope" technique which helped Ali dethrone Foreman in what was called the fight of the year.