Gauff has followed up winning the Grand Slam title which her prodigious talent had long promised with another strong season on the WTA Tour.
Now, after reaching the Australian Open semi-finals in January, she has moved into the last four at a third successive major tournament.
She did it on the Paris clay by recovering from dropping a set for the first time this tournament.
Jabeur played superbly in the opening set, absorbing Gauff’s power from the baseline with her forehand and serving strongly to give her opponent little chance on return.
In a city with a huge Tunisian population, Jabeur always receives passionate support and her fans celebrated her winning the set by singing a popular football-style terrace chant.
Gauff said the atmosphere also inspired her.
“Whenever I’m not playing, I cheer for Ons too, so thank you guys for making it a great atmosphere. I like playing in atmospheres like this,” she told the crowd on Court Philippe Chatrier.
“I know you wanted her to win, but even when I was in the bathroom [after the first set] I was thinking ‘this is really fun, win or lose’.”
Three-time major finalist Jabeur has endured a tough season because of a niggling knee injury and struggled for form before rediscovering her level at Roland Garros.
However, the 29-year-old was unable to sustain the pressure she put Gauff under.
Struggling to land as many first serves, and beginning to make rash decisions in her returning, was costly as Gauff turned the match around.
“The quarter-finals is not bad. I’ll take it,” said Jabeur.
“I’m trying to be less hard with myself and be proud with the way I was fighting.”