On Monday night, Serena Williams played Francesca Schiavone in the first round of the U.S. Open in Queens, but she's been in the city for a few days beforehand to prepare.
It wasn't all work for the tennis star however.
According to an onlooker, Williams, 31, who won the tournament for the fourth time last year, stopped into Dos Caminos in Manhattan last Thursday with a group of pals, including her agent and her assistant.
The group arrived late and didn't order food. Proof that Williams is preparing for the Open? While her friends enjoyed a round of the Mexican restaurant's margaritas, Williams only sipped water.