World No.3 Simona Halep can reclaim the No.1 ranking from Naomi Osaka at the Miami Open. WTA Insider has all the ranking scenarios from Miami.
WTA Insider Courtney Nguyen
March 27, 2019

MIAMI, FL, USA - The No.1 Ranking will belong to either current No.1 Naomi Osaka or No.3 Simona Halep after the Miami Open. Simona Halep kept her No.1 chase alive on Wednesday, after mounting a big second-set comeback to defeat China's Wang Qiang 6-4, 7-5 to advance to her first Miami semifinal since 2015. 

Here's how the Miami Open semifinals stack up:

Ashleigh Barty vs. Anett Kontaveit
Simona Halep vs. Karolina Pliskova or Marketa Vondrousova

By advancing to the semifinals, Halep can overtake Osaka by advancing to her first Miami Open final. Otherwise, Osaka will maintain her hold on the No.1 ranking going into the clay season. 

Halep most recently occupied the top spot in January, before Osaka overtook her by winning the Australian Open title. 

More rankings news:

By advancing to the quarterfinals with a tough three-set win over Yulia Putinseva, Karolina Pliskova will return to the Top 5 after Miami. She will rise to No.5 by making the quarterfinals and No.4 with a semifinal or runner-up finish. If she wins the title, she would move to No.2.
Ashleigh Barty secured her Top 10 debut after Miami by defeating Petra Kvitova to reach her first Premier Mandatory semifinal, moving to No.9 on Monday.

After advancing to her second Premier Mandatory quarterfinal, Wang Qiang will move to No.16 after Miami, the highest ranking held by a Chinese player since the week of November 3, 2014 when Li Na was No.9.

Anett Kontaveit is will move to No.14 by reaching the semifinals and as high as No.12 by winning the title.

Marketa Vondrousova will reach a career-high ranking of No.43 by reaching the quarterfinals. The Czech teenager could climb to No.38 by reaching the semifinals. She would rise to No.31 as a finalist and as high as No.24 by winning the title.

Angelique Kerber will be No.4 or No.5 (if Pliskova reaches semifinals) after Miami. Kerber lost in the third round of Miami to Bianca Andreescu. 
Kiki Bertens, who lost in three sets to Ashleigh Barty in the Round of 16, will move to a career-high No.6 after Miami, followed by Elina Svitolina at No.7. Bertens heads to the Volvo Car Open next week, where she is the defending champion. 

Miami Open defending champion Sloane Stephens, who lost in the third round to Tatjana Maria, will drop to No.8.

Hsieh Su-Wei is projected to move to No.24 or No.25 by reaching the quarterfinals at Miami.