"I think she s having obviously the time of her life playing at Wimbledon and Court 1 and beating Venus and all of these things, which is incredible".
Up in the stands, Mom rose to pump a fist and yell, "Yes!"
A big ace from Hercog set up a second match point at 5-3, but the Slovenian buckled and double-faulted.
Most players, no matter the age, would not be able to find their way out of that sort of a deficit on this imposing a stage, would not be able to handle that sort of stress and figure out a way. But the tale, Gauff decided, needed to have a more rousing ending than this. That much has been established.
There both players went back and forth.
"I thought there was a few ones that I saw way differently", Wozniacki said.
Following her shock defeat over Williams, Gauff said: "Honestly I don't really know how to feel".
Gauff at 15 years and 122 days became the youngest player to qualify for the main Wimbledon draw since the Open era began in 1968.
Last year's runner-up at Wimbledon came up against the same player who eliminated the previous runner-up at Wimbledon.
Coco's next singles match is on Monday against world No. 6-ranked Simona Halep.
The world No 60 took a one-set lead and went a break up in the second with it looking increasingly likely Gauff's fairytale Wimbledon journey would be over.
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Defending men's champion Novak Djokovic was facing Hubert Hurkacz in that arena.
Gauff faced two match points in the second set.
There was also a win for 15th seed Milos Raonic, who beat Reilly Opelka in three-sets in what was a battle of the serves.
Auger-Aliassime had 11 aces but was still broken five times.
Gauff's younger brother, who was beaming with excitement, said he wanted to send a message to his sister that he was proud of her. "Tennis matches can turn on a dime". A slice rally ensued, before Hercog again netted with another unforced error on the forehand. And what she possesses, above all, is some real calm amid a storm.
Rybarikova desperately wanted to force Gauff to serve out the match but she was having none of it, and as the tired Slovakian dumped a return into the net the teenager celebrated another hugely impressive victory. But the teen conjured up a backhand slice victor that dropped right on the chalk. "I just take it one tournament at a time".
Gauff continued her remarkable Wimbledon journey as she fought off two match points to beat Hercog and move into the fourth round.
Yet another reminder how new all of this is for her.
"She earned her way through qualifying, played some exceptional tennis".
But this is no ordinary 15-year-old.
Meanwhile, Andy Murray and Serena Williams will have to wait to make their Wimbledon mixed doubles debut after their opening match was postponed on Friday night. With Gauff on match point, Hercog's high lob was too long, and her third consecutive lost point helped complete one of the biggest comebacks Centre Court has seen.