Agnieszka Radwanska and Angelique Kerber secured fourth-round berths at Wimbledon, but Petra Kvitova crashed out in the second round.
Third seed Radwanska was pushed hard by Anya Konjuh in the second round on Thursday but had a more routine outing on Saturday, overcoming Katerina Siniakova 6-3 6-1.
The Pole will meet Dominika Cibulkova in the fourth round after the Slovakian eliminated 2014 Wimbledon finalist Eugenie Bouchard 6-4 6-3.
Kerber had troubles of her own but dispatched of Carina Witthoft 7-6 (13-11) 6-1 to set up an encounter with Misaki Doi, but Kvitova suffered her earliest Wimbledon defeat since 2009 with a 7-5 7-6 (7-5) defeat to Ekaterina Makarova.
RUTHLESS RADWANSKA SET FOR STERNER TEST
A brilliant display from Radwanska, vastly improved from her previous encounter against Konjuh, ensured her place in the fourth round.
The Pole finished her triumph with an excellent cross-court forehand against the promising Siniakova, but Cibulkova will pose a greater threat next up.
Cibulkova won the Eastbourne International in June and will prove a formidable opponent, but Radwanska appears to be growing into the tournament.
KVITOVA CRASHES OUT
Makarova saw off Kvitova in straight sets in Miami in March and the Russian did so again on Saturday in a match blighted by rain.
The world number 35 was aided in her bid to reach the third round with the two-time Wimbledon champion and 10th seed producing 43 unforced errors.
Makarova hit just 12 winners but produced a more consistent display than the Czech, earning herself a match against 24th seed Barbora Strycova.
Kvitova said: "I just think that in the important points, she didn't really miss, and I felt that I have to really go for it, which I tried to do it. Unfortunately sometimes it didn't happen."
KERBER, KEYS AND HALEP MARCH ON
It was not easy for Kerber as she battled from 5-3 down before winning a first-set tie-break against fellow German Witthoeft.
The Australian Open champion found the going easier in the second set, while Halep dispatched on Kiki Bertens comfortably 6-4 6-3.
The Romanian will meet Keys in the fourth round after the American was made to work by unseeded Frenchwoman Alize Cornet but came out on top 6-4 7-5 6-2.
SAFAROVA ENDS CEPELOVA STORY
Jana Cepelova produced the biggest shock of the women's draw when she defeated second seed Garbine Muguruza on Thursday.
However, despite taking a one-set lead, the Slovakian qualifier was unable to get the better of 28th seed Lucie Safarova.
The Czech saved match point before going on to triumph 4-6 6-1 12-10 in a match that almost lasted three hours.
Safarova will face Yaroslava Shvedova for a place in the quarter-finals after the Kazakh defeated Sabine Lisicki 7-6 (7-2) 6-1.