Nowhere in tennis makes Coco Gauff's nerves fizz like Centre Court at the All England Club. But the 17-year-old American didn't exactly look as though she was suffering from heavy legs, a hammering heartbeat and a tight arm - all the classic signs of a jumpy, nervous tennis player - as she reached the last 16 at Wimbledon for the second time. 

While Gauff had felt the nervous tension in her second round on Centre Court, on this occasion she looked to be much more at ease with the privilege of playing on what she calls an "exclusive" rectangle of grass as she defeated Slovenia's Kaja Juvan 6-3, 6-3. She is yet to drop a set this Fortnight. 

Two years after Gauff's giddy ride to the fourth round of The Championships as a 15-year-old qualifier, and the summer when Wimbledon went loco for Coco, she is back in the second week once again. But this summer doesn't have the same vibe as 2019, when everything was happening so fast that her memories of playing on Centre Court that year are now just a blur.

She feels like a different player and person now. In line with a significant upgrade in status, from qualifier to No.20 seed, Gauff has returned to Wimbledon with the "belief" - though not the "expectation", as she doesn't like that word - that she can go far here and she dreams of being back on Centre Court for next Saturday's final. 

Getting comfortable on Centre Court will only help Gauff realise her grass court ambitions. The walk from the locker-room to the court only adds to Gauff's nervousness when she plays on the grandest stage of all. She notes the "guards" and "lots of artwork" and feels as though she is strolling through a museum.

But the more she plays on Centre Court, the more she will become accustomed to the experience, and the more relaxed she will feel about being in this arena. 

"I wasn't as nervous as I was before my second round. I'm honoured to be on this court. It's not often that a 17-year-old gets to play on this court," said Gauff, who will play Germany's Angelique Kerber, the 2018 Wimbledon champion, on Monday.

An extended eight-minute warm-up, which was offered to the players as the rain had prevented them from going through their usual preparations on the practice courts, would have helped Gauff to deal with any nerves, and she won the first four games of the match. A few minutes later, she struck a forehand with such pace that Juvan could only duck out of the way rather than attempt to play a volley.

While Gauff couldn't serve out the opening set at 5-1, she had a second opportunity two games later, which she took. Such was Gauff's control of the second set, she never appeared to be in any danger of having to play a decider.