The 2019 US Open is the 139th edition of tennis’ US Open and the fourth and final Grand Slam event of the year. It is being held on outdoor hard courts at the USTA Billie Jean King National Tennis Center in New York City.
Novak Djokovic and Naomi Osaka were the men’s and women’s singles defending champions. Neither managed to defend their title, with Djokovic retiring in the fourth round due to a shoulder injury against Stan Wawrinka, and Osaka losing in the fourth round against Belinda Bencic.
Serena Williams set an Open Era record by reaching 10 US Open finals.
It was the first time since the 2017 Australian Open and fourth time in the Open Era that both the men’s and women’s number 1 seed were defeated before the quarterfinals.