RIYADH: Aryna Sabalenka roared back from a slow start to beat Coco Gauff 7-6(5) 6-2 and clinch a semifinal spot at the season-ending WTA Finals on Thursday, sending the defending champion packing and assuring Jessica Pegula of a place in the last four.

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The world number one, who is seeking a maiden trophy in the event since a run to the final three years ago, finished top of the Steffi Graf Group and next takes on Amanda Anisimova in a rematch of their US Open title clash.

American Pegula takes on in-form Kazakh Elena Rybakina, who qualified for the last four as the best player from the Serena Williams Group.

Undefeated in the Stefanie Graf Group a href="https://www.arabnews.com/%3Ca%20href%3D"https://twitter.com/SabalenkaA?ref_src=twsrc%5Etfw">https://twitter.com/SabalenkaA?ref_src=twsrc%5Etfw">@SabalenkaA defeats Gauff 7-6, 6-2 and books her ticket to the semifinals.#WTAFinalsRiyadh pic.twitter.com/NCOllsRcuy