The U.S. Open is a hardcourt Grand Slam organised by the United States Tennis Association. The tournament was first held in 1881 and originally known as the U.S. National Championships. Here is what you need to know about the year's fourth and final major of the year: WHEN IS THE 2025 U.

NWSL legend Alex Morgan excels on the tennis court in partnering with Coco Gauff in an exhibition leading up to the U.S. Open.