Britons Sonay Kartal and Lily Miyazaki are through to the final round of US Open qualifying, but there were defeats for Heather Watson and Paul Jubb.
Kartal, who has never reached the main draw in New York, beat Switzerland's Simona Waltert 6-3 6-2.
That was followed by Miyazaki's comeback 1-6 6-2 6-2 victory over Liechtenstein's Kathinka von Deichmann.
However, Watson was beaten 6-1 6-4 by second seed Aliaksandra Sasnovich of Belarus while Jubb lost 6-3 6-7 (3-7) 6-3 to Finland's Otto Virtanen.
Billy Harris, Francesca Jones and Jan Choinski are all in qualifying action later on Wednesday.