New Haven - French Open finalist Sara Errani and former Wimbledon runner-up Marion Bartoli booked a quarter-final clash at the WTA's New Haven Open on Tuesday.
Italy's Errani, the fourth seed, defeated Spain's Carla Suarez Navarro 6-4, 6-3, while fifth-seeded Bartoli of France survived a scare to beat American Sloane Stephens 6-1, 0-6, 6-3.
Bartoli trailed 0-3 in the third but won the next six games to advance in the US Open tune-up event.
Top-seeded Agnieszka Radwanska was due to open her campaign later Tuesday with a second-round clash against qualifier Olga Govortsova of Belarus.
Meanwhile, first-round action concluded as China's Zheng Jie defeated Bulgarian Tsvetana Pironkova 7-5, 6-2 to set up a second-round match with eighth-seeded Czech Lucie Safarova.
Results on Tuesday from the WTA New Haven Open (x denotes seeding):
Zheng Jie (CHN) bt Tsvetana Pironkova (BUL) 7-5, 6-2
Olga Govortsova (BLR) bt Agnieszka Radwanska (POL x1) 6-0, 2-1 ret
Maria Kirilenko (RUS x7) bt Mona Barthel (GER) W/O
Marion Bartoli (FRA x5) bt Sloane Stephens (USA) 6-1, 0-6, 6-3
Sara Errani (ITA x4) bt Carla Suarez (ESP) 6-4, 6-3