Twice down break point while two games from victory against world No. 1 Aryna Sabalenka, Elena Rybakina stepped up to serve. She had let victory slip through her fingers against Sabalenka two months earlier in Berlin, squandering four consecutive match points in a third-set tiebreak. She had suffered close losses from winning positions all year.

Canadian teenager Victoria Mboko reached her first career WTA Tour semifinal with a 6-4, 6-2 win over Jessica Bouzas Maneiro on Monday night at the National Bank Open. She will face Elena Rybakina, who advanced when Marta Kostyuk retired due to injury.