Top-seeded Timea Bacsinszky of Switzerland advanced to the semifinals of the Grand Prix SAR, saving all four break-points she faced against Johanna Larsson of Sweden in a 6-4, 6-1 win on Thursday.
Bacsinszky, ranked 15th, broke Larsson's serve three times, and next faces either fifth-seeded Timea Babos of Hungary or Pauline Parmentier of France, who played their quarterfinal late.
Former champion Kiki Bertens needed nearly three hours to beat No. 8 Yulia Putintseva of Kazakhstan 6-3, 6-7 (7), 6-3.
Bertens, who won her only career title at this tournament in 2012, saved 13 of 15 chances on her serve.
She next faces 186th-ranked Marina Erakovic of New Zealand, who beat Aleksandra Krunic of Serbia 6-4, 6-4 in a match opposing two qualifiers.