Jannik Sinner has a new partner for the US 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 $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.