World number two Iga Swiatek and world number three Coco Gauff both secured their spots in the semi-finals of the WTA Finals in Cancun, Mexico.
Poland’s Swiatek confirmed her position with a 6-1 6-2 win over world number six Ons Jabeur.
Earlier, Gauff claimed a victory in a battle of two of the major champions from this year.
She defeated Marketa Vondrousova 5-7 7-6 (4) 6-3 in the final round of group play on Friday night, ending the Czech player’s chances of advancing to the last four.
The win was another feather in the cap for Gauff, making her the first teenager to make the final four of the year-end championships since Caroline Wozniacki in 2009.
The 19-year-old will now face Jessica Pegula while Swiatek takes on Aryna Sabalenka.
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