The shoot involved 400 extras, who spent nine hours being filmed for crowd shots while actors kicked fake goals.
Mourinho will play on his reputation for being a surly manager who does not show emotion on the pitch. The commercial is scheduled to air in May.
American Express retains Ogilvy & Mather for its advertising. The credit card company is famous for its long-running advertising campaign that featured the actor Karl Malden and the slogan: "Don't leave home without it."
More recently it has used celebrities in its advertising, including Jerry Seinfeld and Robert de Niro, whose spot was criticised for showing a shot of Ground Zero in New York City.
American Express's most recent UK advertising campaign used the line "Long live dreams."
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