Cori Gauff continued her stunning debut Wimbledon campaign by beating former semi-finalist Magdalena Rybarikova.
The 15-year-old, who defeated her idol Venus Williams in round one, put in another nerveless display to win 6-3 6-3.
Undaunted by a late venue change and beginning at 8.05pm under the lights of the Court One roof, Gauff wrapped up victory after one hour and nine minutes of scintillating shot-making.
The American told the BBC: "I think I played well, especially on the pressure points. She was serving amazing so it was hard to return sometimes.
"I think I can beat anyone who's across the court" – @CocoGauff #Wimbledon pic.twitter.com/o0RJw6d5n0 — Wimbledon (@Wimbledon) July 3, 2019
"There's so much going on. I'm still shocked that I'm even here."
Gauff will play world number 60 Polona Hercog of Slovenia in round three after she beat 17th seed Madison Keys.
Third seed Karolina Pliskova found Centre Court to her liking as she demolished Monica Puig 6-0 6-4.
Pliskova was taken to a second-set tie-break in her opening-day win over world number 101 Zhu Lin on Court Two, but she felt more at home on Centre.
"I think it was much better than the first round, for sure," she said.
"I had a little bit of trouble in the end, but I think that's normal. She also had some chances to play good tennis. So she played.
"I felt the best here in Wimbledon today. The court was super nice, a little bit faster than the outside courts. So it was good.
"Centre for sure the fastest for me. I just like that much better than Court Two. Normally Court Two is not my favourite here."
Next Pliskova will face Hsieh Su-Wei, the 28th seed, who beat Kirsten Flipkens 7-6 (3) 6-3.
Touching scenes on No.3 Court as Margarita Gasparyan is forced to retire through injury against Elina Svitolina...#Wimbledon pic.twitter.com/0xlFCU9L52 — Wimbledon (@Wimbledon) July 3, 2019
Russian Margarita Gasparyan left the court in tears after being forced to retire while leading against eighth seed Elina Svitolina.
The world number 62 was on the verge of a potential shock having won the first set and serving at 5-5 in the second.
But Gasparyan, who has a history of knee problems, seemed to injure her knee after serving and required lengthy treatment on the baseline.
The 24-year-old attempted to soldier on but soon gave up, tearfully walking to the net to shake hands with Ukrainian Svitolina.
Seventh seed Simona Halep was taken the distance in the all-Romanian showdown on Court Two.
The 2018 French Open champion eventually beat Mihaela Buzarnescu 6-3 4-6 6-2 in an hour and 51 minutes.
Halep will face a fellow former world number one, Victoria Azarenka, who won 12 games in a row in sweeping aside Ajla Tomljanovic.
Caroline Wozniacki, who has never made it past the fourth round, beat unseeded Russian Veronika Kudermetova.
Wozniacki, seeded 14, needed a tie-break in the first set and went on to win 7-6 (5) 6-3.
Anett Kontaveit, the Estonian 20th seed, saw off Britain's Heather Watson 7-5 6-1 and Yulia Putintseva, who knocked out second seed Naomi Osaka in round one, came crashing back down to earth with a straight-sets defeat to world number 81 Viktorija Golubic.
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