Top professional tennis players earn a staggering amount of money every year. This is due to the large viewership and high demand for the sport, which leads to lucrative endorsements and prize money. The top players can make upwards of $20 million a year from prize money, sponsorship deals, and endorsements. This is a huge sum of money compared to the average tennis player, who earns only a fraction of this amount. The earning potential of a professional tennis player is immense, and it's no surprise that many of the world's best flock to the sport.