Kostyuk retires from Ningbo match, hands Muchova WTA Finals slot

Marta Kostyuk retired from her second-round match at the Ningbo Open on Wednesday, which resulted in Karolina Muchova securing the final qualifying spot for the season-ending WTA Finals. Kostyuk's withdrawal was the decisive factor in Muchova clinching her place at the prestigious year-end tournament. The match took place at the Ningbo Open, a WTA event held in China.