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Tennis
Huge monetary rewards are the reason why tennis is on this list, and tennis players are at the top of the rankings of the richest athletes in the world. Serena Williams was the highest-paid athlete in 2018. That year she earned over 18 million dollars. And Maria Sharapova, who took the 5th place in that list, made $10.5 million. But the record payment belongs to the Swiss athlete Roger Federer, the winner of Grand Slam tournaments, who earned $60 million a year from advertising alone.
