In 1977, British photographer John Stewart was summoned to Chicago by Muhammad Ali, ‘The Greatest’, to take his portrait. As Stewart recalled, ‘We worked steadily for three days, mornings only, in a film studio I had rented. Ali always arrived on time, accompanied by friends, handlers and helpers. He was a real trouper and lent himself to all the demands, tricks and manipulations that a photographer pulls out of his bag.’ This powerful, timeless image of Ali’s raised fist speaks for itself as an indelible portrait of a 20th century icon.