Defending champion Serena Williams and 2004 winner Maria Sharapova remained on a Wimbledon semi-final collision course on Saturday as only six of the top 10 seeds made the fourth round.
Four-time winner Williams, who needs to make the semi-finals to avoid dropping out of the top 100, eased past Russia's Maria Kirilenko 6-3, 6-2 in easily her most dominant display at the tournament so far to reach Monday's fourth round.
Williams will face France's Marion Bartoli, the 2007 runner-up, who made the last 16 after beating Italy's Flavia Pennetta in a tense affair where she kicked her own father off court.
Seventh seeded Williams had come into her 12th Wimbledon on the back of an 11-month injury lay-off, recovering from a foot injury and life-threatening blood clots on her lungs.
But after needing three sets to see off Aravane Rezai and Simona Halep in her first two matches, the 29-year-old looked back to her best on Court One.
She fired down 10 aces and 32 winners past the outclassed 27th-seeded Kirilenko, wrapping up victory on her third match point. "I'm feeling better and glad to still be in the tournament," said Williams.
"I just need that rhythm that I have been missing and keep serving like I did did today."
Fifth seed Sharapova saw off Klara Zakopalova of the Czech Republic 6-2, 6-3 and will tackle China's Peng Shuai for a place in the quarter-finals.
"I haven't been past the fourth round for a few years so I am happy to get where I am. I hope to go one step further and even more," said Sharapova. "It's great to be in the second week. The opponents will get tougher but raising your level is what it's all about at the Grand Slams."
Peng, the only Chinese player left in the draw after the second round exits of French Open winner Li Na and Zheng Jie, reached the fourth round for the first time with a 6-2, 7-6 (7/5) win over unseeded Hungarian Melinda Czink. Top seed Caroline Wozniacki reached the fourth round for the third successive year with a 6-3, 6-2 win over Australia's Jarmila Gajdosova. Wozniacki, still searching for a first Grand Slam title, will next face Slovakian 24th seed Dominika Cibulkova who booked her last 16 place with a 6-4, 1-6, 6-3 win againdsst German 16th seed Julia Goerges.