Up until now, Ostapenko and Swiatek have never met on a clay court. Earlier this year, the 2017 Roland Garros champion improved to 5-0 by decisively claiming their Doha semifinal, 6-3, 6-1.

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Ekaterina Alexandrova ousted sixth seed Mirra Andreeva, 6-3, 6-2, firing eight aces to seal her fourth Top 10 win of the season. Alexandrova is coming off a semifinal showing at Charleston’s green-clay 500-level event, where she was edged out by eventual titlist Jessica Pegula 7-5 in the third. The world No. 22 gets a shot at winning a rubber match (having prevailed in Doha) with the American, as Pegula and Coco Gauff rolled through their openers with identical 6-1, 6-1 scorelines.