The highlight of the 18-year-old Gauff's season was, of course, her stunning run to the French Open final, where she lost to Iga Swiatek.
The American hit four aces and returned four out of seven break points to take the win against Belinda Bencic in the second round.
Garcia is seeded seventh in San Diego and she will be hoping to go deep into the tournament, but her first test against home favourite Collins will be tricky.
Jabeur, who was involved in the final of Wimbledon earlier this year, beat Australia's Ajla Tomljanovic in the quarter-final.
Garcia and Mladenovic pulled off an upset in the round of 16 when they beat fourth seeds Jelena Ostapenko and Lyudmyla Kichenok by a score of 6-4, 6-2.
With the win over Zhang Shuai, Gauff became the youngest quarter-finalist at the Flushing Meadows since Melanie Oudin in 2009.
Caroline Garcia and Alison Riske are scheduled to face one another in a round of 16 match of the US Open 2022 on Sunday, September 4.
Caroline Garcia and Anna Kalinskaya are scheduled to face one another in a second round match of the US Open 2022 on Wednesday, August 31.
Monday's opening round of the 2022 US Open will pit world number 17 Caroline Garcia against 90th-ranked Kamilla Rakhimova of Russia.
Petra Kvitova, who is ranked 28th in the world, will compete against Caroline Garcia, who is ranked 35th, in the 2022 WTA Cincinnati Open final on Sunday.