The 2018 US Open will be the 138th edition of tennis' US Open and the fourth and final Grand Slam event of the year. It will be held on outdoor hard courts at the USTA Billie Jean King National Tennis Center in New York City. This will be the last Grand Slam to have 32 seeds with the format reverting to 16 seeds in 2019. Rafael Nadal and Sloane Stephens are the previous year's men's and women's singles champions.