Some of the biggest stars in men's and women's tennis will take the court together at the US Open for reimagined mixed doubles competition.

Venus Williams and Reilly Opelka take on Karolina Muchova and Andrey Rublev at 12:30 p.m. ET today, Aug. 19. The first day of the US Open Mixed Doubles tournament is airing on the ESPN+ streaming service. Right now, ESPN+ costs $11.99/month for new subscribers.

Veteran doubles experience overcame singles stardom as defending champions Andrea Vavassori and Sara Errani reached the semi-finals at the U.S. Open's reimagined mixed doubles on Tuesday, as the event kicked off with a new format and new fans.

Top singles names and unlikely pairings share the stage in a made-for-primetime mixed-doubles tournament with a million-dollar stakes. Here are the results from Day 1.

The U.S. Open overhauled its mixed doubles tournament in hopes of drawing the top singles players. The defending champions don’t intend to move out of the way so easily.

While regular doubles players may not like US Open’s reimagined mixed doubles competition, it certainly managed to bring new fans to the stadium on the first day of the event.

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.

With Elena Rybakina in Yonex, Venus Williams in custom Khaite, and Taylor Townsend in her own gear, tennis style was on show in New York.

The world number one in singles with set to take part in the revamped event alongside Czechia’s Katerina Siniakova, but was forced to pull out of the competition

Jannik Sinner pulled out of the U.S. Open mixed doubles tournament shortly before it began on Tuesday, a day after he quit in the first set of the Cincinnati Open final because he was feeling ill. The No.