Ad of the Day: Ali Fights Ali in This Epic Spot for the Porsche 911

Maria Sharapova and chess king Magnus Carlsen also battle themselves

Imagine if, in his prime, Muhammad Ali laced up his gloves and stepped into the squared circle against … himself.

@DaveGian David Gianatasio is a longtime contributor to Adweek, where he has been a writer and editor for two decades. Previously serving as Adweek's New England bureau chief and web editor, he remains based in Boston.