Professional tennis is one of the most profitable mainstream sports in the world. The first top tennis players earn a lot of money and they are always valued in the millions.

Here are the top 10 athletes by total career earnings:

1. Novak Djokovic: $169.8 million (Serbia)
2. Rafael Nadal: $134.6 million (Spain)
3. Roger Federer: $130.6 million (Switzerland)
4. Serena Williams: $94.8 million (USA)
5. Andy Murray: $63.7 million (Scotland)
6. Pete Sampras: $43.3 million (USA)
7. Venus Williams: $42.4 million (USA)
8. Simona Halep: $40.2 million (Romania)
9. Maria Sharapova: $38.8 million (Russia)
10. Petra Kvitova: $36.6 million (Czech)

And this is without taking into account advertising contracts and other earnings.

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