Top 10 highest-paid tennis players.

Roger Federer - Earnings: $90 million
Roger Federer is a Swiss professional tennis player widely regarded as one of the greatest players of all time. In 2021, he earned $90 million, making him the highest-paid tennis player in the world. This figure includes earnings from his lucrative endorsement deals with companies like Rolex, Credit Suisse, and Uniqlo, as well as his prize money from tennis tournaments.

Naomi Osaka - Earnings: $60 million
Naomi Osaka is a Japanese professional tennis player who has quickly risen to the top ranks of women's tennis in recent years. In 2021, she earned $60 million, largely due to her numerous endorsement deals with companies like Nike, Nissan, and Louis Vuitton. She also has lucrative deals with several Japanese brands, including Nissin Foods and Shiseido.

Novak Djokovic - Earnings: $50.6 million
Novak Djokovic is a Serbian professional tennis player who is widely considered one of the best players of all time. In 2021, he earned $50.6 million, largely due to his on-court success, which includes winning several Grand Slam titles, as well as his endorsement deals with brands like Lacoste, Asics, and Head.

Rafael Nadal - Earnings: $40 million
Rafael Nadal is a Spanish professional tennis player who is widely regarded as one of the greatest clay-court players of all time. In 2021, he earned $40 million, largely due to his endorsement deals with brands like Nike , Babolat, and Santander. He also has his own line of tennis academies and a luxury yacht company.

Serena Williams - Earnings: $28 million
Serena Williams is an American professional tennis player who is widely considered one of the greatest players of all time. In 2021, she earned $28 million, largely due to her endorsement deals with brands like Nike, Gatorade, and Lincoln. She also has her own clothing line, Serena, and is a part-owner of the Miami Dolphins NFL team.

Andy Murray - Earnings: $23.5 million
Andy Murray is a Scottish professional tennis player who has won several Grand Slam titles throughout his career. In 2021, he earned $23.5 million, largely due to his endorsement deals with brands like Castore, Under Armour, and Jaguar He also has his own line of tennis apparel, AMC.

Stan Wawrinka - Earnings: $13 million
Stan Wawrinka is a Swiss professional tennis player who has won several Grand Slam titles throughout his career. In 2021, he earned $13 million, largely due to his endorsement deals with brands like Yonex, Evian, and Audemars Piguet He also has his own line of tennis apparel, Stanimal.

Kei Nishikori - Earnings: $11.8 million
Kei Nishikori is a Japanese professional tennis player who has been ranked as high as world No. 4 in singles. In 2021, he earned $11.8 million, largely due to his endorsement deals with brands like Wilson, Uniqlo, and Nissin Foods. He also has his own line of tennis gear, K.