Elena Rybakina will become the WTA world No. 1 for the first time after defeating Zheng Qinwen 3-6, 6-1, 6-4 in the US Open quarterfinals. The comeback sent Rybakina into the last four in New York and guaranteed that she will replace Aryna Sabalenka at the top when the rankings are updated after the tournament.
Rybakina needed three contrasting sets to complete the milestone. Zheng controlled the opener, Rybakina dominated the second and the deciding set turned on a late service break. The new No. 1 finished with 20 winners and showed why her first-strike game is so difficult to contain once her serve and return begin working together.
Rybakina vs Zheng quarterfinal result
| Match detail | Result | |---|---| | Winner | Elena Rybakina | | Score | 3-6, 6-1, 6-4 | | Rybakina winners | 20 | | Tournament stage | US Open quarterfinal | | Ranking outcome | Rybakina guaranteed world No. 1 |
The result was also significant for Zheng. The Olympic champion entered the tournament as a qualifier after dealing with a chronic elbow injury and became the first qualifier to reach the US Open women's quarterfinals since Emma Raducanu's title run in 2021. Her opening-set level showed how dangerous she remains when healthy.
How Zheng won the first set
Zheng absorbed Rybakina's early power and competed especially well in the longest pressure game of the set. Serving in the ninth game, she saved five break points before holding. That resistance denied Rybakina a route back into the set and allowed Zheng to close it 6-3.
The game mattered beyond the scoreboard. Rybakina had created opportunities but could not convert them, while Zheng gained confidence from surviving repeated attacks. In a match between two aggressive baseliners, the player who protects second serves and controls the first shot after the return usually dictates the rally. Zheng did that more consistently in the opener.
Why the match changed in the second set
Rybakina raised her return position and execution, then started taking time away from Zheng. The statistical contrast was decisive: Zheng produced only one winner in the second set, while Rybakina struck 10. A 6-1 score followed.
This was not simply a case of hitting harder. Rybakina became more disciplined about where she directed the first powerful ball, using depth through the middle to limit Zheng's angles before opening the court. Her serve also created shorter replies, allowing her to attack without taking unnecessary risks from defensive positions.
Zheng, meanwhile, found it harder to protect the elbow and maintain the same clean acceleration over repeated exchanges. Her tournament deserves credit given the route back from injury, but Rybakina forced her to sustain a level that became increasingly difficult as the match progressed.
The decisive break in the third set
The final set stayed close until the penultimate game. Zheng again fought off pressure and saved three break points, but a double fault eventually handed Rybakina the crucial break. Rybakina then served out the match to secure both a semifinal place and the top ranking.
That sequence captured the difference between the players on the day. Zheng repeatedly found ways to survive, but Rybakina created enough return pressure that one loose point could decide the match. Elite tennis often works that way: a two-hour contest can turn on a second serve placed a few centimetres outside the box.
When will Rybakina officially become world No. 1?
The ranking change will become official when the WTA publishes its post-US Open rankings. Live-ranking calculations can identify the outcome during a tournament, but the official list is updated after the event's points are applied and expiring points are removed.
Rybakina's achievement reflects performance across the rolling 52-week ranking period, not only this quarterfinal. Grand Slam results carry the largest available points, so a deep US Open run can create a major shift, but consistency at other tournaments built the platform for her rise.
She will be the first player representing Kazakhstan to hold the WTA singles No. 1 ranking. Rybakina was born in Moscow and changed sporting representation from Russia to Kazakhstan in 2018. Her 2022 Wimbledon title made her Kazakhstan's first Grand Slam singles champion, and reaching No. 1 adds another landmark.
Who does Rybakina play next?
Rybakina will face Coco Gauff in the US Open semifinal after the American advanced from the other side of the quarterfinal draw. The matchup creates a sharp tactical contrast. Rybakina wants quick points behind her serve and flat groundstrokes; Gauff's defence, speed and ability to extend rallies can force her to hit extra balls.
Rybakina entered New York with fitness questions after retiring from a match in Cincinnati. Reaching the semifinal and surviving a physical three-set quarterfinal are encouraging signs, but recovery will be important. The emotional impact of securing No. 1 can also cut both ways: it removes one source of pressure while introducing attention that can distract from the remaining title race.
What the No. 1 milestone means
World No. 1 is a measure of sustained results, while a major title rewards performance over a single fortnight. Rybakina now has the chance to combine both in New York. Her Wimbledon trophy already established her at the highest level, but leading the official rankings confirms that her results across the season have surpassed every rival's total.
The US Open title is not guaranteed, and the semifinal will test her ability to reset after a career milestone. Still, the quarterfinal demonstrated a valuable championship trait: she found a practical answer after losing the first set rather than waiting for Zheng's level to fall.
For more from New York, see our reports on Frances Tiafoe's semifinal comeback, Ben Shelton's win over Carlos Alcaraz and the US Open 2026 schedule and viewing guide. MatchUpWorld's latest results and analysis are available in Sports.
