Belarus’ world number one Aryna Sabalenka saw off world number 64 Viktoriya Tomova of Bulgaria, 6-3, 6-0 in 58 minutes to book the Miami Open third-round spot.
Paired with Romania’s Elena-Gabriela Ruse, Kostyuk fought hard in the quarterfinals but ultimately lost to Hsieh Su-wei (Chinese Taipei) and Jelena Ostapenko (Latvia) in a three-set match.
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