Keothavong is in the form of her life in India

British number two Keothavong, 24, eased into the final four with a 6-1 6-3 win over Israel's Tzipora Obziler.

She will now face another unseeded player, Ukraine's Mariya Koryttseva, who was a 6-4 6-2 winner over Tatiana Poutchek of Belarus.

In the other semi-final, Slovak second seed Daniela Hantuchova plays Russian fourth seed Maria Kirilenko.

Hantuchova saw off Taiwan's Chan Yung-jan 6-4 6-1, while Kirilenko beat Italian seventh seed Flavia Pennetta 6-3 6-1.