Marta Kostyuk Twirls Into Wimbledon Quarter-Finals Despite Mid-Match Drama and Heat Illness

Marta Kostyuk has battled through intense conditions to secure her first-ever Wimbledon quarter-final appearance, defeating American qualifier Ashlyn Krueger 6-4, 6-4. However, the historic triumph was quickly followed by an unexpected setback as the Ukrainian star was forced to withdraw from her doubles match due to a sudden illness. Sweating through a 31 C (88 F) heatwave at the All England Club, the 12th seed extended her phenomenal 2026 run before the physical toll of her high-stakes campaign caught up with her in the afternoon.

The Bottom Line

• The 24-year-old Ukrainian reached her first-ever Wimbledon quarter-final by beating Ashlyn Krueger 6-4, 6-4 in 1 hour and 23 minutes.
• Kostyuk maintained a perfect 10-0 record against players from the United States this season.
• Hours after her singles victory, she withdrew from the women’s doubles tournament alongside partner Elena-Gabriela Ruse.
• The world No. 13 later confirmed she is struggling with stomach issues caused by the severe heat and match pressure.
• The current draw is completely wide open for the remaining players after the early exits of top seeds Iga Swiatek, Aryna Sabalenka, and Elena Rybakina.

Breaking It Down

Stepping out onto No. 2 Court as the clear favorite, Kostyuk faced a dangerous opponent in world No. 102 Krueger, who entered the match with an impressive 16-1 record on grass courts this season. The opening set was a test of nerves. While the Ukrainian struggled to find consistency with her first serve, landing it just 43 percent of the time, she showed exceptional poise under pressure to win 75 percent of those specific points. Krueger, conversely, undermined her own efforts by committing 12 unforced errors against only five winners, allowing the more experienced Kostyuk to seal the opening set 6-4.

The second set delivered immediate drama as the American qualifier rallied, breaking Kostyuk midway through to establish a 4-2 lead. Yet, the hallmark of Kostyuk's tennis this year has been an unyielding competitive spirit. Showing immense resilience, she chased down a wicked forehand down the line from Krueger, executing a spectacular cross-court response that forced a crucial error into the net. This ignited a four-game surge, giving Kostyuk two consecutive breaks of serve to take the match on her own racquet and finish with another 6-4 victory.

The celebration was pure Kostyuk, featuring her signature ballerina-style power pirouette on the grass as the SW19 crowd cheered. But behind the joy, physical distress was creeping in. The Ukrainian spent several minutes slumped on her bench, closing her eyes, stretching, and drinking water. By mid-afternoon, tournament organisers confirmed that Kostyuk and Ruse had withdrawn from their scheduled doubles match against Ellen Perez and Demi Schuurs, handing the ninth seeds a direct walkover into the next round.

Why This Matters

This tournament represents a massive professional shift for Ukraine's No. 2 player, who previously described her relationship with grass as "horrendous" after consecutive straight-sets third-round defeats at Wimbledon in 2023 and 2024. Her transformation follows an incredible run to the semi-finals at Roland-Garros and a major title victory at the Madrid Masters earlier this season. Kostyuk credited her new-found consistency to a deliberate psychological choice to stop obsessing over winning and focus on enjoying the tour.

For tennis fans in GB, this victory intensifies an already unpredictable Wimbledon. With Swiatek, Sabalenka, and Rybakina all knocked out before the quarter-finals, the £64.2 million tournament is guaranteed to crown a refreshing champion. For Kostyuk, the stakes are incredibly high; she has moved up to No. 11 in the live rankings, sitting just 194 points away from breaking into the global Top 10 for the very first time in her career.

What Comes Next

The 12th seed will have exactly two days to rest, recover from her stomach issues, and adapt to the rising London temperatures before she takes to the court for her singles quarter-final match. She is scheduled to face either the 17th seed Jasmine Paolini of Italy or the 32nd seed Alexandra Eala of the Philippines, who previously caused a massive tournament shock by ousting defending champion Iga Swiatek.

FAQ

Why did Marta Kostyuk withdraw from the Wimbledon doubles tournament?

Kostyuk withdrew due to ongoing stomach issues brought on by a combination of the 31 C heatwave in London and the intense psychological pressure of playing for her first Wimbledon quarter-final.

Who will Marta Kostyuk play next in the singles draw?

She will face the winner of the fourth-round match between Italy's Jasmine Paolini and Alexandra Eala of the Philippines.

What is Marta Kostyuk's record against American players this season?

Following her straight-sets victory against Ashlyn Krueger, Kostyuk holds a perfect 10-0 record against players from the United States in 2026.