The 2019 WTA Finals, also known by its sponsored name Shiseido WTA Finals Shenzhen, was a women's tennis tournament held in Shenzhen, China. It was the 49th edition of the singles event and the 44th edition of the doubles competition. The tournament was contested by eight singles players and eight doubles teams. This was the first time Shenzhen held the WTA Finals.

Ashleigh Jacinta Barty is an Australian former professional tennis player and cricketer. She was the second Australian tennis player to be ranked world No. 1 in singles by the Women's Tennis Association (WTA), holding the ranking for 121 weeks overall. She was also a top-10 player in doubles, having achieved a career-high ranking of No. 5 in the world. Barty is a three-time Grand Slam singles champion, claiming titles at the 2019 French Open, the 2021 Wimbledon Championships, and the 2022 Australian Open. She is also a major doubles champion, having won the 2018 US Open with CoCo Vandeweghe. Barty won 15 singles titles and 12 doubles titles on the WTA Tour.