Fans will not be permitted to participate in the US Open qualifiers to "make sure the health and safety of everyone."
The main event will have a large audience when it starts on August 30th.
The qualifying week will see the "most" players and on-site support staff, and the organizers estimate that there will be more than 2,500 people.
The organizer said: "Given the huge fame of the U.S. Open qualifiers among fans, this is a most difficult decision for the U.S. Tennis Association."
"However, after discussing with the US Open medical team and local health authorities, it was decided, that ensuring everyone's health and safety is the right decision."
Due to Covid-19, the indoor capacity of the USTA Billie Jean King National Tennis Center in Flushing Meadows has been decreased, and during qualifying, many players’ facilities have been moved outdoors.
The organizer added: "Therefore, while ensuring the safety of players and fans, there is not enough space for fans to visit the site-this is still our main concern."
The 2020 US Open singles championship was won by Austria's Dominic Thiem and Japan's Naomi Osaka. This is the fourth and final Grand Slam tournament on the tennis schedule.