The runner-up to Serena Williams at the All England Club 12 months ago, Kerber needs to reach the final again to have a chance of holding on to top spot in the rankings. During that breakthrough season, Kerber won her first two major titles, at the Australian Open and U.S. Open.
After dropping the opening set, Kerber fell behind 3-1 in the second set before mounting her comeback.
It's great to reach the second week.
However, Kerber raised her game in the nick of time to pull level, before coming through a dramatic decider to claim a 4-6 7-6 (7-2) 6-4 victory on No.2 Court.
"I'm really not looking out of the schedule", Kerber said. "It was tough to find my rhythm actually". "I have to be aggressive, as well, and trying to (play) my game from the first ball that we hit".More news: China's Xi warns against 'impermissible' challenges in Hong Kong
"For me, it's just more simple than that".
The key was that I was fighting, and I was never giving up. doesn't matter what the score was.
A dead net-chord on the very first point of the tie-break gave her an early advantage but the backhand that had served her so well in the two sets went to pieces and at changeover, she trailed 1-5. Vandeweghe, the No. 24 seed, had 23 winners, compared to Riske's five.
Seventh seed Svetlana Kuznetsova of Russian Federation eased through with a routine 6-4, 6-0 victory over Slovenia's Polona Hercog. Radwanska was the runner-up at the All England Club in 2012 to - yes, that's right - Serena Williams.
Magdalena Rybarikova continued her fine run on grass this year with a comfortable 6-2 6-1 victory over Ukraine's Lesia Tsurenko, while Petra Martic defeated Zarina Diyas 7-6 (8-6) 6-1.More news: Americans Say Civility Has Worsened Under Trump; Trust In Institutions Down
For the men, seven-time Wimbledon champion and No. 3 seed Roger Federer of Switzerland was playing 27th-seeded Mischa Zverev of Germany in Saturday's final match on Centre Court. He picked up his 236th win at a major.
Raonic, who lost to Andy Murray in last year's final, is into the fourth round for the third time in four years.
The third-round match was suspended Friday by darkness after 2 hours, 54 minutes with Querrey leading 6-5 in the fifth set.
Querrey will meet South African Kevin Anderson in the fourth round. "I expected a lot of tricky shots from her and a lot of entertaining rallies", said the Polish ninth seed.More news: Ronaldo leads Portugal to win Third Place at FIFA Confederations Cup