Madison Keys, Anastasia Kharchenko, Piia Suomalainen and Caitlin Whoriskey all advance to the quarterfinals.
Willoughby's Kyle McPhillips lost to Gabriela Paz, 6-3, 6-0, in the second round of the Cleveland Ladies Open at the Chagrin Valley Athletic Club in Chagrin Falls.
Nicola Slater, who knocked off top-seeded Diana Arutyunova, 6-4, 5-7, 6-3, will play Yuliana Lizarazo in a quarterfinals match today beginning at 10 a.m. Following that match, Paz will play Sabrina Santamarina, a 6-3, 6-3 winner over Chun-Yan He.
Madison Keys, Anastasia Kharchenko, Piia Suomalainen and Caitlin Whoriskey also advanced to the quarterfinals.