From Toronto, Mboko started the year ranked outside the top 300. She upset top-seeded Coco Gauff 6-1, 6-4 on Saturday to reach the quarterfinals, then topped Jessica Bouzas Maneiro 6-4, 6-2 on Monday.
From Kazakhstan, Rybakina won at Wimbledon in 2022. She has nine career WTA Tour victories, winning in May on clay at Strasbourg.
Rybakina beat Mboko 6-3, 7-5 last month in Washington.
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AP tennis: https://apnews.com/hub/tennis