Kerber was the runner-up to Serena Williams at the All England Club last year.
Kerber, who is hoping to become the first German to win the Wimbledon title since Steffi Graf in 1996, has endured a difficult first week at this year's championships and needed three sets to see off Shelby Rogers in the third round. "I have to be aggressive, as well, and trying to (play) my game from the first ball that we hit".
Top-ranked Angelique Kerber and third-seeded Milos Raonic both advanced to the fourth round at the All England Club, though they had different experiences on court.
But somehow the top seed survived into the fourth round, where she will play Garbine Muguruza of Spain in a battle of the last two Wimbledon beaten finalists.
"I'm very pleased with the way I've felt, the way I've played".
Yet another former runner-up to Williams, Polish ninth seed Agnieszka Radwanska, also progressed to the last 16 with a 3-6 6-4 6-1 victory over Swiss Timea Bacsinszky.
Querrey will next face South Africa's Kevin Anderson, whom he leads 7-5 in head-to-head series.
Other winners Saturday were unseeded Croat Petra Martic who beat Zarina Diyas 7-6 (6), 6-1, and unseeded Slovak Magdalena Rybarikova, who followed-up her upset of No. 2 Karolina Pliskova with a 6-2, 6-1 thrashing of the Ukraine's Lesia Tsurenko.
"I had a great match, especially as she's a really tricky opponent", Radwanska commented after her 3-6 6-4 6-1 Centre Court win.
However, the 29-year-old showed her pedigree to hold and win the next two games, bringing the set back on serve.
In doubles earlier in the tournament, Rogers and Donna Vekic of Croatia suffered a 7-5, 6-1 first-round loss to Mona Bartel of Germany and Anett Kontaveit of Estonia.
"I was down 2-4, and I think I had break point also against me 2-5", Kerber said afterward. "I played a lot of times against her, and I know her game".
The Swiss third seed who is aiming for the record books as he goes for a 19th grand slam title, lost the first six points of the match and his first service game before establishing his deadly rhythm. She did not drop a set during the first week.
"I never feel that comfortable in grass", the Spaniard said after her win.
Tsonga thrashed a ball high over the Court 2 stands after losing, and Querrey sympathized with the difficulty of serving in a close match after an overnight interruption.
Seventh-seeded Svetlana Kuznetsova of Russia made her way into the second week of a Grand Slam for the 32nd time in her career with a 6-4, 6-0 trouncing of qualifier Polona Hercog of Slovenia in 65 minutes.
Dimitrov, a Wimbledon semifinalist in 2014, will next face either Federer or Zverev.
El Boca-River de las glorias en La Pedrera terminó en empate
Por el lado de River se destacaron las presencias de Enzo Francescoli, Ariel Ortega y Hernán Díaz, quienes fueron dirigidos por Mario Argenta .
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