“Greatness comes from within. From pitting you against you,” says the new Porsche 911 commercial, featuring Magnus Carlsen, Maria Sharapova, and Muhammad Ali. The ad goes on, “Onto the greatest version of you. Through the magic of film, we get to see what would happen if Muhammad Ali stepped in the ring against himself. If Maria Sharapova faced off against herself. And if Magnus Carlsen sat across a board from himself. All to help tell the story of a new 911 being born.”