Nadal first signed with Nike at the age of 13, where he earned just $500,000 over five years. In 2008, he signed a 10-year contract extension worth over $10 million per year. In 2018, another five-year extension was signed for $10 million per year, according to Yahoo Sports.

Rafael Nadal is about to officially head into retirement after the Davis Cup, and with the possibility that we'll see him play his final match on Tuesday, his friend and rival Roger Federer penned a beautiful message to Rafa on social media.

Roger Federer is saying a fond farewell to Rafael Nadal. On Tuesday, Nov. 19, Federer, 42, posted an emotional tribute to his former sports rival Nadal, 38, on Instagram ahead of the tennis ace's last tournament before retiring at the 2024 Davis Cup Finals, which begins on Nov. 19.