World No. 1 Elena Rybakina withdrew from the WTA Finals on Saturday because of a viral illness. Marta Kostyuk took her place in the singles field at Indian Wells.
Rybakina won the 2025 season finale in Riyadh. She finished this season 54–14 with four titles, including the Australian Open and US Open, and will end the year at No. 1.
Source: Official event coverage.
Photo: WTA/Getty Images.
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