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| R4 | Sophie Chang d. Ann Pepper | 6-1; 6-3 |
| R4 | Mayo Hibi d. Kourtney Keegan | 6-2; 4-6; 6-4 |
| R4 | Brooke Austin d. Jamie Loeb | 4-6; 6-2; 7-6(1) |
| R4 | Nora Tan d. Michaela Schulz | 6-4; 6-3 |
| R4 | Kyle McPhillips d. Emily Safron | 6-0; 6-1 |
| R4 | Blair Martin d. Mariely Hassey | 6-4; 7-6(4) |
| R4 | Kendal (Q) Woodard d. Alyza Benotto | 6-3; 6-2 |
| R4 | Liza Fieldsend d. Kristi Elmer | 6-4; 6-4 |
| R4 | Gabrielle Andrews d. Kaitlyn McCarthy | 6-4; 7-5 |
| R4 | Kennedy Davis d. Kristen Poei | 6-3; 6-3 |
| R4 | Rebecca Weissmann d. Cassandra (Q) Vazquez | 6-1; 6-4 |
| R4 | Hannah Camhi d. Sara Remynse | 6-3; 6-2 |
| R4 | Melissa Lord d. Gina Li | 6-1; 6-2 |
| R4 | Sarah Dvorak d. Mary Closs | 6-7(4); 7-6(1); 6-3 |
| R4 | Tiffany Tavares d. Makenzie Craft | 6-1; 6-4 |
| R4 | Angela Chen d. Mary Liz Swanson | 6-1; 6-3 |
| R4 | Grace Egger d. Rachel Schneider | 6-1; 6-0 |
| R4 | Olivia Sneed d. Spencer Liang | 6-3; 6-2 |
| R4 | Maegan Manasse d. Mia (Q) King | 7-5; 6-3 |
| R4 | Madeline Lipp d. Lexi Borr | 6-2; 0-6; 6-3 |
| R4 | Brittany Lindl d. Rachana Bhat | 6-3; 6-2 |
| R4 | Michelle Satterfield d. Natalia (WC) Janowicz | 6-3; 6-2 |
| R4 | Erin Larner d. Lacey Sprinkel | 6-0; 6-0 |
| R4 | Kimberly Yee d. Peggy Porter | 6-3; 6-3 |
| R4 | Kassidy Jump d. Scout Shutter | 6-0; 6-3 |
| R4 | Victoria Bensimon d. Emily Serrano | 6-1; 6-7(5); 6-1 |
| R4 | Monica Lin d. Ariana Rodriguez | 7-5; 7-5 |
| R4 | Jillian Rooney d. Natasha Prokhnevska | 6-2; 3-6; 6-4 |
| R4 | Stephanie Lin d. Lani Rae Green | 6-1; 2-6; 6-3 |
| R4 | Michelle Lui d. Virginia Norder | 6-0; 6-2 |
| R4 | Samantha Hampton d. Caitlin Eichten | 6-0; 6-1 |
| R4 | Meghan Kelley d. Hannah Drayton | 6-3; 3-6; 6-3 |
| R4 | Iris Lin d. Katie Kim | 6-4; 6-4 |
| R4 | Ines Vias d. Katherine Nelsen | 6-1; 6-4 |
| R4 | Bennett Dunn d. Sara Brown | 6-1; 6-0 |
| R4 | Taylor Davidson d. Ashley Dai | 6-2; 6-2 |
| R4 | Natalie Looney d. Elizabeth Stewart | 6-3; 6-1 |
| R4 | Kimmy Guerin d. Audrey Ann Blakely | 6-3; 7-5 |
| R4 | Skylar Holloway d. Shea Flanagan | 6-2; 6-3 |
| R4 | Dayna Lord d. Amy Zhu | 2-6; 7-6(4); 6-4 |
| R4 | Kristin Wiley d. Hailey Rochin | 6-4; 6-1 |
| R4 | Hadley Berg d. Dani Young | 6-0; 6-4 |
| R4 | Katherine Yau d. Kasey Gardiner | 6-2; 6-0 |
| R4 | Ndindi Ndunda d. Madison Westby | 7-6(5); 6-2 |
| R4 | Victoire Saperstein d. Caroline (Q) Turner | 7-6(1); 2-6; 6-1 |
| R4 | Gabrielle Smith d. Kenna Kilgo | 7-6(4); 6-3 |
| R4 | Ellyse Hamlin d. Callie Frey | 6-1; 6-1 |
| R4 | Jana McCord d. Laura Patterson | 6-3; 6-2 |
All Girls' 18 Singles Matches
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