Nothing, absolutely nothing worked for Coco Gauff on Sunday.

The killer shots and champion's mentality Gauff had meticulously curated during her run to a maiden Grand Slam title at the U.S. Open last year all went AWOL, as her hopes of reaching the Wimbledon quarterfinals for the first time were brutally ended with a 6-4, 6-3, mauling by Emma Navarro.

When the draw put second seed Gauff on a fourth-round collision course with fellow American Navarro, it almost seemed like a foregone conclusion which player would emerge triumphant.

After all Gauff had destroyed the opposition without dropping a set en route to the last 16 at the All England Club.

She was also the only player – man or woman – to reach the semifinals or better at the last three Slams.

However, all of that amounted to absolutely nothing on Sunday as Gauff resembled a lost soul on Centre Court, and the torment running through her mind was clear for all to see when she shouted at her coach Brad Gilbert: "Tell me something. You guys aren't saying anything."

With Gauff having admitted that she had found herself in "a dark place" following her shock first round exit here 12 months ago, Gilbert stood up in the player's box and tried to calm down the world number two with some hand gestures and words of wisdom. But with Navarro's game on fire, nothing made a difference.

"We had a game plan going in. I felt that it wasn't working. I don't always ask for advice on the box. Today was one of those rare moments where I felt I didn't have solutions," summed up a glum Gauff. "I definitely have to learn from today, because it's not going to be the first or last time that a player plays a great match against me, and I have to figure out, when those moments happen, how to raise my level."

Lulu Sun outplays Emma Raducanu to reach Wimbledon quarterfinals

The word "astonish" decorated the front of Lulu Sun's white shirt and it served as an entirely appropriate flourish as the 123rd-ranked qualifier dished out a juddering Wimbledon reality check to the United Kingdom's Emma Raducanu on Sunday.

The flickering hope that Raducanu's renaissance could go the distance at the grasscourt Grand Slam was snuffed out emphatically as Sun eliminated the host nation's last standing player 6-2, 5-7, 6-2 to reach the quarterfinals.

Raducanu knew all about the dangers posed by qualifiers at major tournaments after she herself had triumphed as one at the U.S. Open nearly three years ago.

Nonetheless, Sun's performance was so impressive that even Raducanu must have been slightly astonished by the ice-cool composure and unflappable bravery the New Zealander showed to outplay the 2021 Flushing Meadows champion in front of a pumped-up home crowd on Centre Court.

"It was a great match. I really dug deep to get the win," Sun said, composing herself after having dissolved into tears before her on-court interview. "I really had to fight tooth and nail, because she was obviously going to run for every ball and fight until the end."

Raducanu had shown glimpses of her best form over the opening week at the All England Club, and her victory over Greece's ninth-seeded Maria Sakkari in the previous round had sparked hope among British fans that her revival could prompt a deep run at her home tournament.

"Six months ago, when I was starting out after surgery, I would have signed for fourth round at Wimbledon," said Raducanu, who had operations on both hands and her left ankle last year. "Of course I'm disappointed. Of course I want more. I think everything does happen for a reason. It just fuels the fire and makes me more hungry."