Serena Williams battles back to beat Camila Giorgi at Wimbledon

Serena Williams battles back to beat Camila Giorgi at Wimbledon

But this nerveless comeback was a sight familiar to all who have admired Williams' warrior instincts throughout a Wimbledon career stretching back 20 years.

"You never know what to expect from her [Ostapenko]", Cibulkova said. I don't feel pressure; I don't feel like I have to win this. "I still have a long way to go to be where I was".

"I've been commentating on all Serena's matches and I think she's very close to her best level". She missed previous year because of her pregnancy but is on an 18-match winning run at the All England Club.

That is going to change now.

Williams will feature in her 11th Wimbledon semi-final in the hunt for her eighth championship at SW19, and Julia Goerges will be her opponent on Thursday, having defeated Kiki Bertens 3-6, 7-5, 6-1. It worked in her favor in the early-going: The 52nd-ranked Giorgi, 26, became the first to win a set against Williams in the tournament. She figured out Giorgi's strong serve, avoided any break points and had just four unforced errors.

Williams hit six of her seven aces in the final set, including one clocked at 122 miles per hour, and won 44 of the last 54 points she served.

"I thought it was a good scoreline", Williams told the BBC after the match. "'I'll just keep fighting", Williams said.

Kerber takes on Latvia's Jelena Ostapenko in the other semifinal.

Drake was photographed smiling in the stands as Williams came back from losing the first set to claim victory over Giorgi, earning her place in the semifinals.

Bertens built a 4-1 lead in the second set with Pliskova appearing to lack energy at times - occasionally making little attempt to chase balls down.

After reaching the Wimbledon quarterfinals for the first time, Isner was far more enthused. "It's great to be in the semis", Kerber said after she finally sealed the win on her seventh match point.

None of the top 10 women's seeds remain in the tournament.

As you can imagine, people were surprised at her lack of any comment or observation about one of the greatest players in the history of the game.

Del Potro will hope his second trip to the Wimbledon quarter-finals mimics his first run into the last eight.

The tall Czech answered an early break with one of her own but 20th seed Bertens secured a second break with a superb touch volley to move 5-3 ahead and then held easily.

Evgeniya Rodina, another mother beaten by Williams yesterday, 6-2, 6-2, did the decent thing and said the American was her idol. Williams, herself, responded with a smile.

This is unchartered territory for 29-year-old Goerges.

"Every match starts from zero", Goerges said of her semifinal matchup against Williams. I don't know. I still have a lot of matches to win.