Day 9 of the 2026 US Open has delivered massive shocks, including Zheng Qinwen's stunning victory over Iga Swiatek. Meanwhile, Coco Gauff continues her dominant run toward the quarterfinals.

  • Coco Gauff is poised to secure a quarterfinal spot against Iva Jovic.
  • Zheng Qinwen caused a massive upset by defeating Iga Swiatek.
  • Elena Rybakina and Mirra Andreeva have successfully advanced to the quarterfinals.

The intensity at Flushing Meadows has reached a fever pitch on Day 9 of the 2026 US Open. As the fourth-round action concludes in the night session, the tennis world is reeling from unexpected results and dominant performances. Coco Gauff (4) is putting on a masterclass on Arthur Ashe, leading Iva Jovic (14) in an all-American showdown that has the crowd on their feet.

Shocking Upsets in the Women's Draw

The headline of the day belongs to Zheng Qinwen, who delivered a monumental performance to stun the world number 8, Iga Swiatek. Despite Swiatek commanding an early 5-0 lead in the first set, Zheng's resilience proved decisive, ultimately winning the match 7-5, 6-3. This loss marks a significant turning point in the tournament's momentum.

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Why This Matters

BozokMedia analysis shows that the tactical shift in women's tennis is accelerating. The ability of players like Zheng to absorb pressure and overturn massive early leads highlights a growing trend of mental fortitude and aggressive baseline play that is redefining the Grand Slam landscape.

In elite tennis, momentum is a fragile thing; one lapse in concentration can turn a dominant lead into a crushing defeat.

Amidst the chaos, Elena Rybakina (2) remained composed, navigating past Naomi Osaka (13) to secure her place in the final eight. Similarly, the rising star Mirra Andreeva (5) has continued her impressive campaign, officially booking her spot in the quarterfinals.

Did You Know?: The Arthur Ashe Stadium is the largest tennis-specific stadium in the world, providing a high-pressure environment for players.

Frequently Asked Questions

Question 1: Who was the biggest upset of Day 9?
Answer: Zheng Qinwen's victory over the highly favored Iga Swiatek was the most significant upset of the day.

Question 2: Is Coco Gauff still in the tournament?
Answer: Yes, Coco Gauff is currently leading her match against Iva Jovic and is on track for the quarterfinals.