Eight days ago, Jannik Sinner couldn’t make it through his match against Carlos Alcaraz in the Cincinnati Open final due to an illness.

Jannik Sinner looked fully recovered from a recent illness as he started his U.S. Open title defense Tuesday with a 6-1, 6-1, 6-2 victory over Vit Kopriva.

Jannik's biggest rival is Carlos Alcaraz, who has a reported net worth of $40 million, and per Forbes, annual earnings of $48.3 million. Alexander Zverev, the world's number three, has a reported net worth of $14 million, and Taylor Fritz, the world's number four, a reported net worth of $10 million and annual earnings of $15.6 million, per Forbes.