Iga Świątek stunned by Marta Kostyuk in French Open 2026 fourth-round shock

Kostyuk’s historic streak and the fall of the world number one

The upset represents a watershed moment in the 2026 season. Marta Kostyuk, who has displayed relentless form, extended her unbeaten streak on clay to 16 matches with the victory. According to Roland-Garros 2026, she is only the second woman to achieve this feat since the current WTA rankings began, joining Justine Henin, who accomplished the streak in 2005. For Świątek, the loss is a bitter birthday disappointment, as the six-time major champion struggled to find a foothold against a surging opponent.

I’m still in shock, you know, to beat such an unbelievable player who won four times here and I lost [three] times to her before this. So, never taken a set off her, it’s incredible. I still cannot believe it.

Marta Kostyuk, 15th-seeded player, via Roland-Garros

The match was characterized by Kostyuk’s tactical discipline and Świątek’s inability to manage the mounting pressure. During a press conference highlighted by The Guardian, Świątek admitted that she did everything within her power to manage the situation, but ultimately struggled to find a solution. Analysts, including former champion Mats Wilander, suggested that the intensity that propelled the four-time champion to the top is currently working against her, noting she may need to rediscover her identity by reducing power and increasing spin.

For more on this story, see French Open: The Must-Watch Match of the Day – May 31.

Sorana Cirstea’s twilight surge at Roland-Garros

While the top of the draw remains in flux, the tournament has witnessed a remarkable resurgence from 36-year-old Romanian Sorana Cirstea. Following a 6-3, 7-6 (7-4) victory over Chinese qualifier Wang Xiyu, Cirstea has secured a spot in her second French Open quarter-final—a milestone reached 17 years after her first appearance in the final eight.

As reported by the BBC, Cirstea is currently playing the final year of her career, a decision she has maintained despite her recent success. Her form has been electric, including a victory over world number one Aryna Sabalenka in Rome earlier this month. Cirstea attributes her performance to a shift in perspective compared to the early stages of her professional life.

I think when I was really young, it was a little bit of life or death every single match. I would win, I was very, very happy. I would lose, [for] two days I would be crying. I have so much passion for the sport. I have so much joy playing, but at the same time, it’s my job.

Sorana Cirstea, 18th seed, via BBC

Cirstea’s outlook remains focused on the immediate future rather than long-term planning, confirming that she is taking her campaign week by week. Her next challenge will be against the winner of the fourth-round match between Russian eighth seed Mirra Andreeva and unseeded Swiss player Jil Teichmann.

The evolving landscape of the 2026 women’s bracket

The departure of Świątek has blown the draw wide open. With the four-time champion out, the tournament is guaranteed to crown a first-time winner at Roland-Garros this year. As Bleacher Report notes, Kostyuk and Cirstea have emerged as the first two contenders to punch their tickets to the quarter-finals, setting the stage for a dramatic second week in Paris.

The implications of this shift are profound for the remainder of the draw. Players who previously operated in the shadow of the world number one must now navigate the heightened expectations of a major title run. For Kostyuk, the victory serves as a definitive statement of her return to form following an injury that sidelined her in February. For the rest of the field, the vacuum at the top of the bracket creates an opportunity of a lifetime, though it also brings an, at times, overwhelming sense of pressure.

As the tournament progresses, the focus will turn toward whether the remaining contenders can maintain their composure under the spotlight. The absence of the established favorite changes the tactical approach for every remaining player, as they adjust to a bracket where any match could result in another surprise exit.