Here's what to know about the 2025 U.S. Open Tennis Championships at the Billie Jean King National Tennis Center in Flushing, New York.

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The US Open, the final major tournament of the tennis calendar, is set to begin Monday with qualifying matches.

The No. 1-ranked Sinner, the defending champion in singles at Flushing Meadows, was supposed to compete in mixed doubles with Katerina Siniakova.

The winning duo will take home a $1 million prize, which is higher than most prize purses for mixed doubles major tournaments. The 16 teams will play over two days. The first round and quarterfinals take place on Tuesday inside the main show courts at the USTA National Tennis Center. The semifinals and championship match will be on Wednesday night.

While Jack Draper and Jessica Pegula may have said all of four words to each other before teaming up for this week’s U.S. Open mixed doubles tournament, the two already sound like an “old married couple.

Playing with Arthur Ashe Stadium as the backdrop, New Jersey’s Michael Zheng dominated Japan’s Yasutaka Uchiyama, 6-2, 6-3, in the first round of qualifying Tuesday on Court 12 at the U.S. Open at the USTA Billie Jean King Tennis Center in Queens,