Top-ranked Iga Swiatek and Ons Jabeur secured their berths with their efforts at the US Open, and Jessica Pegula arrived in Mexico after punching her ticket last week in San Diego.
Others who qualified included Coco Gauff, Caroline Garcia, Aryna Sabalenka and Daria Kasatkina.
Gauff, who secured her place with two wins this week, lost to Viktoria Azarenka 7-6 (2), 4-6, 6-3.
The 33-year-old Azarenka, from Belarus, reached her first semifinal since last October, when she advanced to the final at Indian Wells.
“She’s a young player, but she’s had quite a few already experiences on the tour. I love watching Coco play,” Azarenka said. “I believe that she’s going to do great things in the sport. I feel like she just needs a little bit more to kind of take that one step forward.”
Azarenka, a former No. 1-ranked player in the world, will face off against third-seeded Jessica Pegula, who cruised to a 6-2, 6-2 win over former U.S. Open Champion Sloane Stephens.
With the win, Pegula has 37 victories in WTA 1000 tournaments, the most since 2021. She broke a tie with Swiatek (36).
“I saw the stat that I have the most wins over the last two years,” said Pegula, who is having a breakthrough season. “It´s awesome. When I was younger, I never thought that I could string two wins together, its going to be a special stat for the rest of my career.”