But beneath the surface, the 36-year-old insisted she is feeling unusually calm as she enters the business end of the tournament.
"It's weird. Sometimes I feel, "Man, I'm in trouble". The reprieve was only momentary for Hsieh, as Cibulkova regained her composure to break and take the first set, 6-4. "For whatever reason, I was so calm", Williams said of her emotions as she battled back against Giorgi.
"I just want to be more of that role model for my daughter, for lots of people out there that just want to be inspired".
"I don't have many words today to describe the moment I'm going through right now".
"I just felt calm".
'I think Rafa and Del Potro had to be on Centre Court, ' the former British number one told the BBC.
"I'm hoping this is like a new thing. Honestly, I highly doubt it!"
Williams, for the first time since her comeback, appears to have her body and mind aligned to take that next step.
After claiming a 19th consecutive match win at the tournament she won in 2015 and 2016 but missed a year ago, she said she still had a way to go to regain her top level.
"You're only as good as your last win".
Still, Williams said she's not getting too excited as she's still adjusting to tennis after returning from maternity leave.
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England opener Jason Roy took to Twitter and wrote,"Did us proud @ England ". He sets the tone, he brought this team together.
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Trump has demonstrated all of these tendencies before - including suggesting his hands are tied on pressing Putin. Trump's comments came in a wide-ranging news conference after attending a special meeting on defense spending.
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They can increase investment in USA production, raising employment in extraction and raising demand for oil drilling equipment. Saudi Arabia said that it pumped almost 10.5 million barrels per day last month, compared with 10 million in May.
"Everything right now is a little bit of a surprise, to be here, to be in the semi-finals", she said.
"I always say I plan on it". But when it actually happens, it still is, like, 'Wow, this is really happening'.
The other semi-final matches.
Goerges had gone out in the first round at Wimbledon for the past five years.
Williams is looking for her eighth Wimbledon title and has established herself as the big favorite once again, with the top-10 seeds all eliminated.
The two-time Grand Slam champion from Germany defeated No. 14 Daria Kasatkina 6-3, 7-5 on Centre Court to reach the semifinals at the All England Club for a third time.
But that lifted a weight off her shoulders at the All England Club, where she has become the first Latvian to make a Wimbledon semi-final. I just tried to fight for every point. "It's so much fun".
Angelique Kerber, the highest-seeded player remaining in the women's draw at No. 11, finally converted on her seventh match point to advance to the Wimbledon semifinals. Pliskova had been the only female player in the top 10 to reach the fourth round, the fewest in a Grand Slam event in the Open era following a slew of upsets in the first week.