MONTERREY, Mexico — Third-seeded Ekaterina Alexandrova of Russia beat seventh-seeded Yue Yuan of China 7-5, 7-6 (3) on Thursday night to reach the Monterrey Open semifinals.
Alexandrova will face Lulu Sun of New Zealand, a 6-4, 6-3 winner over Erika Andreeva of Russia in the WTA 500 event at Sonoma Club.
Alexandrova, 29, won the last of her four career WTA Tour titles last year at Hertogenbosch in the Netherlands.
In the other quarterfinals, second-seeded Emma Navarro of the United States faced ninth-seeded Magdalena Frech of Poland, and fifth-seeded Elina Svitolina of Ukraine was set to meet sixth-seeded Linda Noskova of the Czech Republic.