Which US Open show court made its debut on August 29, 2016?

Grandstand made its debut as a US Open show court on August 29, 2016.

The stadium opened on the first day of the 2016 US Open championships as part of a major redesign of the USTA Billie Jean King National Tennis Center in Flushing Meadows, Queens. It replaced the earlier Grandstand stadium, which had occupied a different location in the complex.

The new Grandstand seats 8,125 spectators, making it the National Tennis Center’s third-largest court after Arthur Ashe Stadium and Louis Armstrong Stadium. It was designed by Rossetti Architects and built by AECOM, and it became the world’s first tennis stadium designed to meet Leadership in Energy and Environmental Design standards.

Caroline Wozniacki won the first match held there, defeating Taylor Townsend 4–6, 6–3, 6–4. The court originally used DecoTurf from 2016 through 2019 and switched to Laykold in 2020, so the debut date and surface-change date are separate facts.