Kvitova sailed into the second week of Wimbledon courtesy of her most accomplished performance of the tournament so far.
The fourth seed dropped just one game on her way to a 6-1 6-0 win over Uzbekistan-born American Varvara Lepchenko, setting up a fourth-round meeting with Francesca Schiavone in the process.
That match will no doubt present a harder task for the Czech, but for now she can reflect on a hassle-free opening week that has seen her lose just 13 games in total.
She appears to have got stronger as she has gone along too, having conceded eight games to first-round opponent Akgul Amanmuradova and four to Great Britain's Elena Baltacha last time out.
The only time she looked in any trouble today was when she conceded two first-set break points, but she saved them with ease.
She won 53 points to her 53rd-ranked opponent's 28 and now has a day off to prepare for her meeting with Italian Schiavone, who secured her passage through with a similarly routine 6-0 6-4 win over Klara Zakopalova.
Kazakhstan's Yaroslava Shvedova made history by becoming the first player to win a set at Wimbledon without conceding a point.
The unseeded 24-year-old achieved the feat - known as a golden set - at the start of her third-round match against French Open runner-up Sara Errani on Court Three.
She held serve three times and broke 10th seed Errani each time to take 24 consecutive points.
The only previous player to record a golden set was American Bill Scanlon, who won all 24 points in the second set of his 6-2 6-0 first round defeat of Marcos Hocevar of Brazil at Delray Beach in 1983.
Shvedova held the previous women's record for the most consecutive points won, winning the first 23 points of her match against American Amy Frazier in the 2nd round at Memphis in 2006, but went on to lose the match 16 60 60.
The second set was initially far closer, as Errani staged a fightback, but Shvedova stepped up her game to tie up a 6-0 6-4 victory.
Williams survived by far the biggest first-week test of her Wimbledon campaign as she came from a set down to see off the gutsy challenge of 25th seed Jie Zheng.
Williams previously held a 5-0 win-loss record over Zheng, but the Chinese produced some excellent tennis today to make the American look ordinary at times on the Centre Court where she has previously won four Wimbledon titles.
Zheng often matched Williams for skill and athleticism, but the American's powerful serving - she registered a remarkable 23 aces - enabled her to record a 6-7 (7/5) 6-2 9-7 win.
Williams, who beat Zheng in the 2008 Wimbledon semi-finals, was impressed with the performance of her 28-year-old opponent.
"She played unbelievably well," said Williams, who faces Shvedova in round four.
"I kept fighting in that third set. If I was going to go out I wanted to go out fighting.
"It was good to go through. I needed a tough match like that."
Belarusian second seed Azarenka overcame Slovakian Jana Cepelova 6-3 6-3 on Court Two.
Ana Ivanovic came from a set down to defeat Julia Goerges 3-6 6-3 6-4, while Austria's Tamira Paszek beat Belgian Yanina Wickmayer 2-6 7-6 (7/4) 7-5 to set up a fourth-round clash against Italian 21st seed Roberta Vinci, who edged past Croatian Mirjana Lucic 7-6 (7/4) 7-6 (7/3).