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Story summary
- Elena Rybakina defeated Naomi Osaka 6-1, 6-4 to reach the US Open quarterfinals.
- Rybakina will claim the WTA world No. 1 ranking if she reaches the semifinals, overtaking Aryna Sabalenka.
- Aryna Sabalenka, world No. 1 for over 100 weeks, risks losing the ranking without a US Open title.
- Coco Gauff and Jessica Pegula could become world No. 1 by winning the US Open if Rybakina loses in the quarterfinals.
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