She did not stop there.
Before the match, Gauff, known as Coco, had told her Instagram followers: "Two of my teachers found out I played tennis after I made the main draw here".
The teenage American - who was not even born when Williams had won her first two Wimbledon singles titles - showed not an ounce of fear on Court One and made light of the 24 years age difference. "After the match, I just told her, 'Thank-you for what she did, I wouldn't be here if it wasn't for you.' I was just telling her she's so unbelievable, I always wanted to tell her that".
Earlier Naomi Osaka became the first top player to lose at Wimbledon, falling to Yulia Putinseva 7-6 (4), 6-2 in the first round.
To highlight just how incredible this result is and also to make you feel very old, Venus was already a two-time Wimbledon victor before Cori was even born.
Gauff's record-breaking career has already earned her an global following. It's insane to show her longevity - that's how I look at it.
"This was definitely the first time I ever cried after a match, winning!" "I wouldn't be here if it wasn't for her", she said.
Russian 17-year-old Anastasia Potapova stunned three-time Major victor and defending Wimbledon champion Angelique Kerber in the first round in Paris.
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The Barcelona star has admitted himself that he has not been at his best, scoring just the one goal in the tournament so far. He's the best, above everyone else ". "It is embarrassing that Copa America is being played in a field like this.
Speaking about Williams' storied career, the young star shared, "I don't think of Venus as old - she's still killing the game right now".
"I was just telling her that she is so inspiring and that I always wanted to tell her that". I don't know how I got to five.
Just 15 minutes after Zverev's defeat, 20-year-old Tsitsipas lost 6-4, 3-6, 6-4, 6-7 (8/10), 6-3 to world number 89 Thomas Fabbiano of Italy.
"She played unbelievable, was just super nice".
USA teenager Cori Gauff made light of the vast gap in experience as she pulled off a stunning upset against veteran Venus Williams in the first round at Wimbledon. Osaka famously beat Serena Williams to win the U.S. Open a year ago. "And even though I met her before, I guess now I have the guts to".
And then in the final game, Gauff needed to erase the disappointment of wasting her initial three match points.
Gauff is now a high school student, and she even completed a science test the night before the qualifying tournament files, according to CNBC.