This is an excellent biography of Andrei Agassi, the former #1 tennis player in the world. It's an emotional journey through the sacrifices required to become a top-tier athlete. For example, even when he was the world's top tennis player, Agassi didn't enjoy tennis. And as it turns out, the book's ghostwriter named J.R. Moehringer also penned Shoe Dog, the biography of Phil Knight, which tells the story of Nike.