It was a fifth meeting between the two Americans, with Pegula having dropped only one set in four previous matches.
Pegula moved to 26-9 on the season and 7-3 on clay with the win, while having made the quarter-finals here a year ago (losing to eventual champ Swiatek).
Pegula, in fact, has been a picture of consistency at the majors over the last year: She’s made three of four quarter-finals dating back to her run to the final eight here, though the world No. 3 is yet to advance to a major semi-final.
Peeking ahead in the draw, she has a major chance to do so this fortnight: Her seeded quarter-final opponent was Maria Sakkari, the Greek No. 8 seed who was knocked out earlier on Day 1 on the same Court Suzanne-Lenglen.
A year ago, Pegula, the Buffalo, New York, native, made the doubles final alongside partner Coco Gauff. The duo are seeded No.2 this year behind last year’s champions, Barbora Krejcikova and Katerina Siniakova.