Dumped out of the Brisbane International last week, Ashleigh Barty retains a comfortable cushion of 1,607 points over Karolina Pliskova, who went on to win the Brisbane title.
Simona Halep moves up to third without playing thanks to Naomi Osaka losing points due to the later start this year of the Brisbane tournament.
Ashleigh Barty won four titles in 2019 including the prestigious WTA Finals and finished the year on top of the WTA rankings.
Simona Halep still has a chance of qualifying having overcome US Open champion Bianca Andreescu in a three-set thriller in her opener.
WTA Finals: Simona Halep moved on top of Purple Group alongside defending champion Elina Svitolina who earlier beat No.2 seed Karolina Pliskova.
China Open: Simona Halep, the reigning Wimbledon champion, brought her tournament to an early end by losing 2-6, 3-6 in 64 minutes in the second round.
Wuhan Open: Simona Halep said she was determined to have a better Asian swing than in past years after an emphatic start to her campaign on Tuesday.
Despite winning the Wimbledon 2019, Simona Halep is still behind Ashleigh Barty, Naomi Osaka and Karolina Pliskova in the WTA rankings.
Simona Halep lifted Wimbledon title by defeating Serena Williams 6-2,6-2 in straight sets.
The 56-minute dissection of the Serena Williams playbook was the 23-time Slam winner's most lopsided loss in a major final.
Simona Halep captured her second career major with a 6-2, 6-2 victory, adding a maiden Wimbledon to her 2018 Roland Garros triumph.
Simona Halep captured her second career major with a 6-2, 6-2 victory adding a Wimbledon to her 2018 Roland Garros triumph.
Wimbledon 2019 Highlights: Serena Williams vs Simona Halep Tennis Score: Simona Halep thrashed Serena Williams to win her maiden Wimbledon crown.
Simona Halep will face seven-time champion Serena Williams for the title on Saturday.
Simona Halep, who is into Wimbledon quarter-finals for the third time, plays Zhang Shuai for a place in the last four on Tuesday.
Amanda Anisimova is the youngest American woman to make the last four at a major since Venus Williams at the 1997 US Open.
Serena Williams heads into this year's French Open with questions surrounding her fitness while Naomi Osaka needs to rediscover her best form to solidify her position at the top of the women's game.
Simona Halep awaits either Dutch seventh seed Kiki Bertens, a finalist in Madrid last year, or 2017 US Open champion Sloane Stephens in the final.