article_snippet: The 24th seed advances to face Jelena Jankovic in the semi-finals on Friday after the Serb progressed when Ukrainian qualifier Lesia Tsurenko retired from Ukrainian qualifier Lesia Tsurenko last eight encounter with an ankle injury while trailing 6-1 4-1.
article_snippet: The other semi-final will be contested by Romanian Simona Halep and top seed Serena Williams, back at Indian Wells after a 14-year boycott of the event where Sabine Lisicki alleged Sabine Lisicki had suffered racist abuse from fans.
article_snippet: American Williams, who clinched Sabine Lisicki 19th grand slam singles title at this year's Australian Open, and world
article_snippet: Serena Williams is also in the last four after Serena Williams win over Timea Bacsinszky .
highlights_snippet: Sabine Lisicki will now face Jelena Jankovic in the semi-finals on Friday .
  
highlights_snippet: Simona Halep takes on Serena Williams in the other last-four clash .