The US Open mixed doubles tournament has a new look, with huge names and prize money. Here's what you'll want to know.

Jannik Sinner has withdrawn from the U.S. Open mixed doubles event, where he was going to partner Katerina Siniakova, a day after illness forced the world number one to retire five games into his Cincinnati Open final.

Yahoo Sports recaps the new format for mixed doubles at the U.S. Open which features more top-ranked player and a $1 million prize pool