This isn't the first time she has come face-to-face with her hero either - when she was eight, Gauff's father managed to get front-row tickets to the U.S. Open and she even got her autograph.
Earlier this week, she had said: "They're great role models for the sport and in general. I'm super excited to play against Venus. I've never practised or hit with either of them.
"My first U.S. Open I went to when I was eight we saw a Venus match, my dad somehow got us front-row tickets. I got her autograph, I was so happy.
"After the match she gave the ball kids one of the balls and he gave it to me — I don't know if she told him to."
Gauff was the youngest U.S. Open junior finalist at 13, and according to Forbes is set to earn $1million (£800,000) from endorsements in 2019.
Her serve is already among the quickest in women's tennis. She reckons her fastest serve was 122mph.
At Wimbledon last year in the women's singles, only two players broke the 120mph mark: Venus and Serena.
"I want to be the best of all time — better than Serena," she added.
"I to hit like her, take the ball early like her.
"I wouldn't say everything is modelled around her but if you watch me play you definitely see little bits of Serena."
