Christina McHale advanced to the semifinals of the Bell Challenge, rallying to beat Polona Hercog of Slovenia 1-6, 7-6 (4), 6-3 on Friday night.
American teenager Madison Keys beat No. 8 seed Magalena Rybarikova 6-2, 6-2, in the first round of the $795,000 Bank of the West Classic on Monday.
Top seeded Kirsten Flipkens of Belgium came from a set down to beat Croatia's Ajla Tomljanovic and advance to the third round of the Aegon Classic in Birmingham on Wednesday.
Melanie Oudin's defense of her Aegon Classic title lasted only 57 minutes Monday, with the American losing 6-3, 6-1 to Croatian qualifier Ajla Tomljanovic in the first round.
Top-seeded Daniela Hantuchova beat Ajla Tomljanovic 6-0, 2-6, 6-4 in the first round of the Bell Challenge on Tuesday.