After a four-set win on Thursday night, No. 1 seed Rafael Nadal will face Leonardo Mayer in the third round of the 2017 U.S. Open Tennis Championships today.
The 15-time Grand Slam champion, who earned an estimated $31.5 million last year — $5.5 million in prize money and $26 million from off-court appearances and endorsements — is looking to collect a third U.S. Open title.
The trophy would come with a sizable check: $3.7 million, which is the most lucrative payout in tennis history.
Nadal and Mayer won't be the only ones on court Saturday: The ballkids, who tried out for the job in June, are responsible for chasing down netted forehands, rolling balls quickly to the server's side of the court and repeatedly running towels to the players, among other miscellaneous tasks.