EMMA RADUCANU AND Carlos Alcaraz sit side-by-side, in separate chairs, two armrests forming a barrier between them. It's mid-June, and US Open organizers have asked the former singles champions -- now doubles partners -- to help promote the tournament's new mixed doubles event by making a social media video.

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 US Open Mixed Doubles will begin on Tuesday, with Emma Raducanu teaming up with Carlos Alcaraz in New York, but the Spaniard's tight schedule could be an issue