With victory in the final, Barty became the fifth woman (after Serena Williams, Maria Sharapova, Petra Kvitová, and Dominika Cibulková) to win the tournament on their first attempt. Barty was also the first player since Williams in 2014 to win the WTA Finals in the same year they won a Grand Slam title, and the third player to win both the WTA Finals and the WTA Elite Trophy after Venus Williams and Petra Kvitová.
In addition to Barty, Bianca Andreescu, Belinda Bencic and Sofia Kenin (as an alternate replacing Andreescu) made their debuts in the event. This was also the first WTA Finals tournament since 2009 when both alternates were used.
Barty secured the year-end WTA no. 1 singles ranking after playing her second round robin match. Karolína Plí?ková and Naomi Osaka were also in contention for the top ranking at the start of the tournament.
Barty took home $4.42 million in prize money as a result of winning this tournament, which is the most prize money ever won by any player at a single tournament in tennis history, male or female.
+ Following WTA rules, Bertens' retirement against Bencic was counted as a straight-set loss in determining round robin standings.
+ Following WTA rules, Andreescu's retirement against Plí?ková was counted as a straight-set loss in determining round robin standings.
Standings are determined by: 1) Number of wins; 2) Number of matches; 3) In two-player ties, head-to-head records; 4) In three-player ties, (a) percentage of sets won (head-to-head records if two players remain tied), then (b) percentage of games won (head-to-head records if two players remain tied), then (c) WTA rankings