Tennis fans return to USTA Billie King National Tennis Center on first day of 2021 U.S.
A person looks on from a terrace as fans who show their proof of vaccination against the coronavirus disease (COVID-19) returned to the USTA Billie King National Tennis Center on the first day of the 2021 U.S. Open tennis tournament, in the Queens borough of New York City, New York, U.S. August 30, 2021. REUTERS/Andrew Kelly
