Serena Williams breezed through to the last eight at Wimbledon with a 6-2 6-2 demolition of Elena Dementieva.
The American top seed and defending champion took just 22 minutes to clinch the opening set against the 21-year-old Russian.
Williams, who surrendered just 18 games in reaching the fourth round, lost her serve in the sixth game when the 15th seed produced some stunning groundstrokes.
But the world number one struck back immediately to close out and take control of the match.
The second set went the same way, with Dementieva having no answer to the power of her opponent, and the match was over in 51 minutes.
Williiams now faces Jennifer Capriati who reached the quarter-finals with an effortless 6-2 6-3 win over Anastasia Myskina.
Myskina, one of five Russians in the last 16, was outgunned and outrun by Capriati who raced to a 4-0 in the first 15 minutes and never let her dominance slip.
Venus Williams avenged her shock French Open defeat by Vera Zvonareva to join her sister in the quarter-finals.
The American fourth seed, the champion in 2000 and 2001, raced to a 5-0 lead in the opening set before taking it 6-1.
Zvonareva put up more resistance in the second but went down 6-3 as her Wimbledon challenge was ended in exactly one hour.
Williams has advanced to the quarters without dropping a set, losing just 16 games in four matches.
"Last time she (Zvonareva) was a better player and this time it was nice that I was able to win. It was really nice to have won but I would have liked to have played better," she said after the match.
Venus now faces 1999 champion Lindsay Davenport who booked her fifth-round berth with a 6-4 6-1 victory over Japan's Shinobu Asagoe.
The 1999 title winner and fifth seed took the opener with a single break of serve which never looked like being overturned.
Asagoe, the world's 81st-ranked player, scored a notable victory over rising Slovak star Daniela Hantuchova, but struggled to keep pace with Davenport.
She held her opening service game in the second set, but then was broken twice and again a third time as Davenport wrapped up the win in just 48 minutes.
Second seed Kim Clijsters became the quickest player in 21 years to reach 50 wins in a season as she strolled into the quarter-finals.
She beat her doubles partner Ai Sugiyama 6-3 6-2 and in the process achieve a milestone last set this early by Martina Navratilova in 1982.
Clijsters took the first 13 points of the match but did not have things all her own way as Sugiyama broke back as the Belgian served for the set.
But the 13th seed's own serve continued to let her down in the second set as Clijsters broke for 3-2.
Two games later she took advantage of two double faults to break again and served out for another comfortable win.
She will next play Silvia Farina Elia after the Italian beat Argentine Paola Suarez 7-5 7-6 (7/3).
Russian starlet Maria Sharapova's inspired run at Wimbledon came to an end at the hands of compatriot Svetlana Kuznetsova, who prevailed 6-1 2-6 7-5.
The 33rd seed lines up against French Open champion Justine Henin-Hardenne in the last eight, after the Belgian saw off rejuvinated Frenchwoman Mary Pierce 6-3 6-3.