Arthur Ashe Stadium (Noon start)
 Petra Martic (CRO) vs.  Yulia Putintseva (KAZ) – Maybe a small upset …
 Naomi Osaka (JPN) vs.  Anett Kontaveit (EST) (late night) – Osaka seems likely to reach the final.
Louis Armstrong Stadium (11 a.m.)
 Angelique Kerber (GER) vs.  Jennifer Brady (USA) – Already underway, but I would have picked Kerber had I posted this sooner.
 Petra Kvitova (CZE) vs. Shelby Rogers (USA) (not before 3 p.m.) – Kvitova is in good form.