They replace DecoTurf, the hard-court surface played on at the U.S. Open since 1978. Laykold courts have been used at the Miami Open and New York Open and for Fed Cup matches in the United States.

Here are 15 surprising rules a ball person must follow at the US Open, ... A ball boy waits on a court during a match of the 2017 US Open at the USTA Billie Jean King National Tennis Center.

At the U.S. Open, he won the singles title in 2021, and at the Australian Open, he reached the finals in 2021 and 2022. Medvedev was onto something about the courts at Indian Wells.

2015 US Open tennis: The science behind how the courts at USTA Billie Jean King National Tennis Center are created for the U.S. Open.