The 2019 China Open was a tennis tournament being played on outdoor hard courts. It was the 21st edition of the China Open for the men and the 23rd for the women. It was part of the ATP Tour 500 series on the 2019 ATP Tour, and the last WTA Premier Mandatory tournament of the 2019 WTA Tour. Both the men's and the women's events were held at the National Tennis Center in Beijing, China, from September 30 to October 6, 2019. This was also the last edition of the China Open held to date as not being held in 2020 and 2021 due to the COVID-19 pandemic in China.

Naomi Osaka is a Japanese professional tennis player. She has been ranked world No. 1 in singles by the Women's Tennis Association (WTA) and is the first Asian player to hold the top ranking in singles. Osaka is a four-time Grand Slam singles champion, with two Australian Open and two US Open titles. Her seven titles on the WTA Tour also include two at the Premier Mandatory level. At the 2018 US Open and the 2019 Australian Open, Osaka won her first two major titles in back-to-back tournaments. She was the first woman to win successive major singles titles since Serena Williams in 2015, and the first to win her first two in successive majors since Jennifer Capriati in 2001.