That WTA Rising Star was 16-year-old Croatian qualifier Ana Konjuh, who beat Elina Svitolina in the first match of the day, 6-4, 1-6, 6-1. Given the lopsided nature of the second and third sets, the key moment in the match could have been the first set, as Konjuh dug out of a 4-1 hole to take it, 6-4.
It's that kind of mature play that has kept Konjuh rising up the rankings, and she's now the youngest player to reach a WTA semifinal since a 16-year-old Donna Vekic made the Tashkent final in 2012.
"I was not expecting an easy match," Vinci said. "I played well and stayed aggressive from the start."
Having left Wimbledon with a 7-17 record on the year, Vinci is now 7-1 since (14-18 overall).
Perhaps surprisingly, Konjuh actually beat Vinci in the pair's only previous encounter - and perhaps unsurprisingly, Vinci, who always seems to lift her game in the summer, is looking for revenge.
"I'm playing against a young player who I lost against in Auckland in the first event of the year," Vinci said. "I'll have to try my best, and I need to play agressive and come up to the net.
"I am confident and looking forward to the semis."
The other two quarterfinals saw No.1 seed Wozniacki rally past No.8 seed Karolina Pliskova, 6-1, 3-6, 6-2, the third time they've gone to three sets in three career meetings, and Kristina Mladenovic take a two-hour, 23-minute marathon against former French Open winner Francesca Schiavone, 3-6, 6-3, 7-5.
"I'm happy with the way I've been serving this week and it definitely helped me out there today," Wozniacki said. "Karolina is a tough opponent and she always gives me a lot of trouble.
"I knew it was not going to be easy."
"I will have to stay focused and aggressive because my opponent has a good forehand and a good serve," Wozniacki said of her looming match-up with Mladenovic. "I will try and make her run."