The 38-year-old Spanish tennis ace is retiring after the Davis Cup, but he'll still have a robust portfolio of investments and endorsements. By
Brett Knight is a Senior Editor at SportsMoney. He specializes in themes of sports, competitive sports, and the business and marketing aspects of the sports industry, with a focus on topics such as sports figures, basketball, the NBA, Formula 1, and motorsports. Brett's work has been featured in Forbes Middle East, Forbes, RealClearMarkets, Forbes Australia, and ExBulletin.