A spokesperson for the WTA confirmed the medical nature of the withdrawal. Marta Kostyuk will replace the top-ranked player in Group One, with the tournament scheduled to begin on Sunday at the Indian Wells Tennis Garden.

"I am really sad to inform all my fans and supporters that I unfortunately have to withdraw from the WTA Finals this year," Rybakina said in a statement. "I've had an incredible season but my body is just not physically ready to compete."

Rybakina, who was aiming to become the first player since 2014 to win back-to-back WTA Finals titles, will now focus on recovery. She noted that she intends to spend time resting at home to prepare for the 2027 season.

The Kazakh player concludes a dominant 2026 campaign during which she secured the year-end world number one ranking. Her season included victories at both the Australian Open and the US Open, where she defeated Aryna Sabalenka in the final.

Rybakina finishes the year with a 54-14 match record and four titles. Her performance throughout the season was highlighted by 438 aces and 1,775 winners, establishing her as the tour leader in key statistical categories.

The physical setback completely derailed Swiatek's campaign at the prestigious WTA 1000 tournament in China. Chwalinska capitalised on her opponent's physical distress to seal a 7-5, 6-1 victory and book her place in the championship match.

The outcome leaves Swiatek facing an uphill battle in the closing stages of the tennis season to secure one of the remaining qualification spots for the elite eight-player singles championship. Her immediate focus will turn to recovery and upcoming events on the tour calendar.

The contest began positively for Swiatek, who looked in control during the opening exchanges of the first set. She established a commanding 5-3 lead and generated two set points, appearing well on course to secure a place in the final.

However, physical issues began to hinder the Polish player as the set progressed, allowing her childhood friend and compatriot a route back into the match. Chwalinska seized the momentum as her opponent's movement became visibly restricted on the court.

Following a medical timeout, Swiatek courageously opted to continue playing with a heavy bandage strapped to her left thigh. She battled through visible discomfort before eventually yielding to the French Open runner-up in straight sets.

The situation sparked concern among coaching staff and fans alike as Swiatek engaged in an anxious conversation with her physiotherapist and fitness coach, Maciej Ryszczuk. The player was visibly emotional as she struggled to cope with the physical pain.

Addressing criticism on social media regarding the decision to keep playing, Ryszczuk defended the collaborative approach to the match. He revealed that he had advised the tennis star to withdraw on multiple occasions during the encounter.

Ryszczuk stated that he told her three times to stop the match because it was bad for her health. He added that the player ultimately made the decision herself to continue, and that he supported her choice as much as possible.

The defeat leaves Swiatek with 4,189 live points in the race to the WTA Finals, which are scheduled to begin on November 8 and run through to November 15. She currently finds herself fighting for the final qualification berths alongside other leading contenders.

Elina Svitolina recently became the seventh player to secure her place in the prestigious year-end field. That leaves just one remaining singles spot, which is currently occupied by Wimbledon finalist Karolina Muchova on 4,735 live points.

Muchova is not scheduled to compete at the upcoming Ningbo Open, presenting an opportunity for her pursuers. The Ningbo event and the Pan Pacific Open in Tokyo are the two remaining WTA 500 tournaments left in the regular season.

Swiatek is scheduled to enter the Ningbo Open and remains in a direct battle with Marta Kostyuk for the qualification spots. Kostyuk holds 3,920 live points and faces a steep challenge to overhaul the players above her in the standings.

Reflecting on her qualification prospects during a post-match press conference, Swiatek maintained a pragmatic outlook. She admitted that while securing a spot would be positive, her current standing is a fair reflection of her entire season.

Swiatek pointed to missed opportunities earlier in the year, including missing Madrid and suffering an early exit at Miami, as factors in her current predicament. Despite the setbacks, she confirmed her ongoing motivation to compete and succeed.

The multi-time major champion expressed her readiness to press on with her schedule following adequate rest. She confirmed plans to travel to Ningbo to assess her physical condition and continue her push for the year-end championships.

Should she fall short of qualifying, Swiatek acknowledged that an extended vacation would also be an option. The demanding tennis calendar has left elite competitors with little rest as they navigate a relentless series of high-level tournaments.

Beyond the events in Ningbo and Tokyo, additional options remain available for players seeking late qualification points. Two WTA 250 tournaments are scheduled in Chennai and Hong Kong right before the commencement of the WTA Finals.

Meanwhile, the other semifinal at the Wuhan Open produced another historic result as British player Sonay Kartal continued her remarkable run. Kartal secured her place in the biggest final of her career by overcoming Jelena Ostapenko.

The British number achieved a hard-fought 7-6, 7-6 victory over the former French Open champion in a match dominated by tight tie-breaks. Kartal will now face Chwalinska in the title decider following her compatriot's victory over Swiatek.