The American learned another lesson in patience and aggression in her quarterfinal comeback win.

To win the match, though, Jabeur needed those winners to count for two points each. She also made 38 errors, and many of them seemed to come right after a piece of brilliance. Case in point: With Gauff serving at 5-3 in the third set, Jabeur saved a match point by hitting not one, but two perfect drop shots in a single rally. Then, at deuce, feeling confident from the last point, with her cheering section at full roar,, she added a little extra whip to her slice forehand return…and sent it straight into the net.

Bowers had a different reaction this time: “What was that?”

A minute or so later, after a Jabeur smash sailed wide, Gauff had advanced to the semifinals, a 4-6, 6-2, 6-3 winner.

“It was, like, really couple of moments that I missed, was really frustrating,” Jabeur said.

What was frustrating for Jabeur was another lesson—in patience, aggression, and opportunism—for Gauff. Through the first eight games, the American was out-played. But when she served at 3-5, and fell behind in that game, she didn’t get down on herself and let Jabeur off easily. Gauff kept fighting, saved two set points, and held. It didn’t win her the set, but it prolonged the action, and gave Jabeur more time to cool off.

When Jabeur did cool off, early in the second set, Gauff was ready. Serving at 1-2, Jabeur missed an easy backhand at 40-15. Gauff followed immediately with a backhand winner, an aggressive forehand to earn break point, and another baseline attack to break. She was up 3-1, and wouldn’t trail again.

“I felt like she took the advantage and fly away with the set,” Jabeur said.

“She was playing really well the whole match,” Gauff said. “She was hitting a lot of winners, which is something I’m not used to against anyone. So I was trying to be aggressive.”

Gauff upped her aggression from the forehand side in particular. After hitting just one winner from that wing in the first set, she had seven over the last two. While she couldn’t match Jabeur’s flair, she did force the Tunisian into 38 errors. And when Jabeur made her late run, Gauff leaned on her serve to save a break point in the final game. Those two shots, her serve and forehand, are slowly becoming assets rather than liabilities for her.

“My favorite thing about Coco is her fighting spirit,” Jabeur said. “She always tries to find ways, she’s really smart on the court.”

Jabeur was less pleased with the 11:00 start time for this match.

“I would have loved a quarterfinal at night, not at 11:00 A.M.,” she said. “For me, doesn’t make sense. You achieve a quarterfinal…it’s like, no, you play at 11:00.”

This entertaining contest, which was played at a brisk clip between points, and as aggressively as possible during them, deserved better. But the early hour didn’t keep the fans, Jabeur’s or Gauff’s, from getting vocal. There was a team-sport atmosphere in Chatrier, as the two groups went back and forth in support of their players.

“I could tell you wanted her to win,” Gauff said with a smile to the audience. “I like playing in environments like this. I really had a lot of fun. This is just really fun, win or lose.”

In the end, while Jabeur created more highlights, it was Gauff who was the winner. Her shots may not have looked like they should count for two points, but she knew they didn’t need to.