End is close for 31-year-old.
Carla Suarez Navarro was one of four seeds to fall at the first hurdle at the Istanbul Cup.
Johanna Konta made light work of Magdalena Rybarikova.
Garbine Muguruza reached the third round in Madrid.
Daria Kasatkina needed only 57 minutes to brush aside Angelique Kerber at the Indian Wells Masters.
Caroline Wozniacki is into the Australian Open semi-finals after beating Carla Suarez Navarro.