Coco kayoed, Lulu wins as Wimbledon shocks multiply

Another extraordinary shock-laden day in the women's singles at Wimbledon has ended with No.2 seed Coco Gauff being knocked out and a new Centre Court star Lulu Sun having risen.

Gauff was outplayed by her brilliant fellow American Emma Navarro 6-4 6-3 on Centre Court on Sunday in the last-16, ensuring that all three top seeds are now out of yet another open women's tournament.

World No.123 Sun, the first New Zealand woman for 65 years to make the last-16, also booked her place in the quarter-finals, continuing her astonishing run through qualifying to end Emma Raducanu's - and Britain's - hopes with a 6-2 5-7 6-2 victory, also on a deflated Centre Court.

New Zealand's Lulu Sun celebrates her historic win over Emma Raducanu. (AP PHOTO)

US Open champion Gauff was the picture of disappointment, as once again she failed to make it past the last-16 at the event where she first became a 15-year-old star.

The more mistakes she made, the stronger 19th seed Navarro seemed to become, producing an accomplished display to become one of four first-time quarter-finalists at this Wimbledon.

The 23-year-old New Yorker Navarro, daughter of a billionaire financier who was watching from her team box, will next face Italian French Open finalist Jasmine Paolini, who was also involved in a match of high drama as she beat 12th seed Madison Keys.

Keys had to leave No.1 Court in tears after she had served for the match against Paolini before being forced to retire with a hamstring injury she suffered when serving for the match at 3-6 7-6 (8-6) 5-2.

She received treatment and went off the court, returning heavily strapped up, but eventually called it a day at 5-5.

Sun's victory left home fans downhearted after Raducanu's best run since she won the 2021 US Open as a qualifier was finally ended by the cosmopolitan New Zealander, who is threatening to emulate the Briton's achievement of going all the way to a grand slam title.

Emma Raducanu took a tumble and needed a medical time-out in the third set. (AP PHOTO)

Sun will next face Croatian Donna Vekic, who reached the last eight by defeating Spain's Paula Badosa 6-2 1-6 6-4 after a long, rain-interrupted match, a result that guarantees there will be an unseeded semi-finalist.

The 23-year-old Sun, who is the first qualifier to reach the women's last eight since Kaia Kanepi in 2010, has been left delighted by all the support she's received from people following her odyssey.

"I feel the energy from people around the world. I'm super grateful from wherever it's coming from. Just a little support comes a long way," said the left-hander Sun, who has a Chinese mother, a Croatian father and German-English stepfather.

Afterwards, Raducanu, who never really got going and also took a tumble in the final set, defended her decision to pull out of mixed doubles with Andy Murray in what was supposed to be his final event at Wimbledon.

Raducanu had withdrawn on Saturday, citing a stiff racquet wrist, prompting Murray's mother Judy to brand the decision "astonishing" before she later insisted on Sunday that she was only being sarcastic.

Raducanu said: "I'm sure she didn't mean it."

But she added her decision to pull out was a "no-brainer".

"Of course, I didn't want to take his last match away from him. But, at the end of the day, I think a lot of the players in a similar situation would have done the same thing."