The U.S. Tennis Association is donating $300,000 worth of supplies such as clothing, bottled water and soap, along with $100,000 in cash, to Superstorm Sandy relief efforts.
Daily deliveries of supplies began last weekend.
The USTA said Wednesday its cash donation is going to the Mayor's Fund to Advance New York, which is dispersing all money to storm relief efforts and organizations.
The USTA runs the annual U.S. Open Grand Slam tennis tournament, which is held in the Flushing Meadows section of Queens.
USTA President Jon Vegosen says: "New York is the U.S. Open's home, and we want to aid in the rapid recovery of the city, as well as help as many people as we can directly in our home borough of Queens."