Lea Kunst and Melanie Paul also went undefeated on Thursday, winning both their Pool B matches. They started the day with a two-set (22-20, 21-18) victory over Ukrainians Valentyna Davidova and Anhelina Khmil and followed up on it with a sweep (21-18, 36-34) of French Olympians Clémence Vieira and Aline Chamereau.
Americans Savvy Simo and Abby Van Winkle stood out as the top team in Pool C after they topped Dutch Olympian Raisa Schoon and partner Mila Konink in two sets (21-18, 21-11) and defeated Japanese Reika Murakami and Asami Shiba also in straight sets (21-13, 21-19).
Their compatriots Kimberly Hildreth and Teegan Van Gunst had to work harder to finish first in Pool F as they played two three-setters on Thursday. The Americans handled Brazilians Andressa Cavalcante and Tainá Bigi in three sets (18-21, 21-11, 15-12) in their first match and then came out on top in another tie-breaker (21-15, 17-21, 18-16) to take down Australians Elizabeth Alchin and Georgia Johnson.