Emma Raducanu returns a shot against Aryna Sabalenka during the Cincinnati Open at the Lindner Family Tennis Center.

Jannik Sinner has a new partner for the U.S. Open mixed doubles tournament, where Emma Raducanu and Carlos Alcaraz will face the No. 1-seeded team in the first round.

The remainder of the 16-team field was completed Sunday and the draw was conducted ahead of the two-day event that begins Tuesday and pays US$1-million to the winning team.

The top-ranked Sinner will now play with 10-time women’s doubles major champion Katerina Siniakova. He had been scheduled to team with Emma Navarro, before she withdrew to play in the women’s tournament in Monterrey, Mexico, next week.

The other teams added to the event Sunday are two-time U.S. Open women’s champion Naomi Osaka and Gael

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