Rybakina Beats Zheng to Claim World No. 1 and Reach US Open Semifinal

What happened: Elena Rybakina recovered from a set down to beat Olympic champion Zheng Qinwen 3-6, 6-1, 6-4 and advance to the US Open semifinals. The Guardian reports that the result also guarantees Rybakina will become the women's world No. 1 for the first time, giving the quarterfinal a significance that extended well beyond progression in New York.

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The score line captures the shape of the comeback. Zheng took the opening set 6-3, but Rybakina responded emphatically with a 6-1 second set before completing the turnaround 6-4 in the decider. That recovery carried her into the last four and ended the ranking equation immediately: reaching the semifinal was enough for Rybakina to take over at the top.

Why it matters: Rybakina becomes the 30th woman in WTA history to reach No. 1. Her rise ends Aryna Sabalenka's run of 99 consecutive weeks in the position. Sabalenka has spent 107 weeks at No. 1 overall, but the US Open quarterfinal result confirms that the leading place in the women's rankings is changing hands.

Tournament impact: The victory sets up a semifinal between Rybakina and Coco Gauff. According to BBC Sport and Sky Sports, Gauff reached the matchup by saving two match points in a three-set victory over Mirra Andreeva. The semifinal therefore brings together two players arriving through very different quarterfinal tests: Rybakina had to reset after losing the first set, while Gauff survived being one point from elimination.

The ranking milestone adds another layer to the next round. Rybakina no longer needs the semifinal result to validate her move to No. 1; that status was secured by beating Zheng. Her immediate task is now purely tournament-focused: defeat Gauff and reach the US Open final. For Gauff, the match is an opportunity to stop the incoming top-ranked player after already escaping a severe quarterfinal challenge.

What to watch: The central question is which player can carry her comeback momentum into the semifinal. Rybakina's response after the opening set against Zheng showed a decisive shift in the match, while Gauff's saved match points underline how narrow her route to the last four was. Those confirmed results establish the stakes without predetermining how their semifinal will unfold.

Confidence: The quarterfinal score, Rybakina's first No. 1 ranking, the end of Sabalenka's 99-week consecutive reign, and the semifinal pairing with Gauff are confirmed in reports from The Guardian, BBC Sport and Sky Sports. The semifinal result and the eventual US Open champion remain unresolved.