She fought back to beat Italian Camila Giorgi 3-6 6-3 6-4 in a fiercely contested quarter-final on Tuesday.
I know a lot of people won't like that, but I don't care.' Serena Williams had a very different reaction in terms of excitement. 'I don't know what comments he has made about women in sport.
"I faced a thousand and three seeds in my life, so I'm okay", she said.
"Every time I play Giorgi, she always plays that level", Williams told the BBC.
"It's weird. Sometimes I feel, 'Man, I'm in trouble.' Sometimes I feel, 'I can fight.' For whatever reason, today I was so calm", said 36-year-old American, who has been wearing compression leggings as a precaution after a blood-clot scare following her daughter's birth.
"We've played so many tough matches", said Kerber, who sealed the win on her seventh match point and is the highest seeded player remaining in the draw. Ever a great front runner, Serena stepped up to serve for the set and match, winning the first two points and delivered an ace to reach 40-0.
World No 52 Giorgi blasted 20 winners and really took it to Williams, taking the first set thanks to one break, in the sixth game.
Follow the LIVE updates from day 10 action of Wimbledon, where the spotlight would be on the two women's singles semifinals.
He will meet Rafael Nadal at a grand slam for the second time in a matter of weeks after the Spaniard eased past del Potro in the French Open semifinals en route to his 17th major.
Once Williams had figured out how to break the Giorgi serve, though, in the fourth game of the second set, the momentum changed.
"I don't know. Just stay tuned, right?" she said. "But I will sort out some tactics with my team. and we'll be ready".
There were many of them - not least her mighty serve. Winning the first break to go 4-2 up, she then held off three break points in her next service game, before serving out for the set in her next one.
"I have a long way to go". I don't feel I have to win this; I don't feel I have to lose this.
Since seeds were introduced in the 1920s, it's the first time none of the top 10 women have reached the quarterfinals at Wimbledon. It appeared nearly to be a reminder to Giorgi, who said on Monday that she doesn't watch women's tennis.
Earlier, Kerber raced into her second Wimbledon final and fourth Grand Slam showpiece as the German crushed former French Open champion Jelena Ostapenko 6-3, 6-3 in 67 minutes. "It's great to be in the semis", Ostapenko said.
It took a period of accepting the nuances of the surface, to see the results that have taken her further than in any other Grand Slam.