| ITF W25 Claremont | 10/12 18:55 | 28 | [351] Giuliana Olmos v Katie Swan [263] | 5-7,3-6 | |
| ITF W25 Claremont | 10/11 20:10 | 27 | [351] Giuliana Olmos v Catherine Harrison [307] | 1-6,7-6,6-4 | |
| ITF W25 Claremont | 10/10 18:00 | 26 | Giuliana Olmos v Tori Kinard | 6-2,3-6,6-3 | |
| ITF W25 Claremont | 10/09 22:00 | 25 | [177] Robin Anderson v Giuliana Olmos [351] | 3-6,3-6 | |
| ITF W60 Templeton | 09/26 20:45 | 26 | [355] Giuliana Olmos v Coco Vandeweghe [476] | 6-7,6-4,2-6 | |
| ITF W60 Templeton | 09/25 17:00 | 25 | Giuliana Olmos v Sophia Whittle | 3-6,6-3,6-4 | |
| WTA Nanchang | 09/09 08:15 | 25 | [369] Giuliana Olmos v Magda Linette [53] | 3-6,2-6 | |
| WTA Nanchang | 09/08 07:00 | 64 | [189] Emily Webley-Smith v Giuliana Olmos [369] | 1-6,5-7 | |
| WTA Nanchang | 09/07 07:00 | 45 | [457] Eden Silva v Giuliana Olmos [369] | 4-6,3-6 | |
| ITF W100 Vancouver | 08/14 17:00 | 25 | [366] Giuliana Olmos v Xiyu Wang [115] | 1-6,0-6 | |
| ITF W100 Vancouver | 08/13 02:20 | 45 | [224] Ayano Shimizu v Giuliana Olmos [366] | 6-7,1-6 | |
| ITF W100 Vancouver | 08/12 20:05 | 45 | Alexa Glatch v Giuliana Olmos | 6-4,4-6,5-10 | |
| ITF W60 Berkeley | 07/17 19:00 | 25 | Giuliana Olmos v Alycia Parks | 2-6,3-6 | |
| ITF W60 Berkeley | 07/16 21:05 | 54 | [358] Giuliana Olmos v Hayley Carter [445] | Retired | |
| ITF W60 Berkeley | 07/15 21:00 | 54 | Giuliana Olmos v Makenna Thiel | 6-4,6-2 | |
| ITF W60 Honolulu | 07/10 22:15 | 25 | [339] Maegan Manasse v Giuliana Olmos [363] | 7-5,6-2 | |
| ITF W60 Honolulu | 07/09 20:50 | 54 | [363] Giuliana Olmos v Tara Moore [464] | Retired | |
| ITF W60 Honolulu | 07/08 21:40 | 54 | Giuliana Olmos v Ellie Douglas | 6-2,6-3 | |
| ITF W25 Monzon | 05/07 12:35 | 25 | [353] Giuliana Olmos v Marina Melnikova [283] | 4-6,4-6 | |
| WTA Prague | 04/27 11:30 | 45 | [355] Giuliana Olmos v Giulia G-Monticone [169] | 0-6,2-6 | |
| WTA Istanbul | 04/21 08:00 | 45 | [76] Veronika Kudermetova v Giuliana Olmos [352] | 7-6,6-1 | |
| WTA Monterrey | 04/01 20:40 | 25 | [114] Nao Hibino v Giuliana Olmos [357] | 4-6,6-1,7-6 | |
| WTA Guadalajara | 03/12 03:20 | 25 | [116] Fiona Ferro v Giuliana Olmos [343] | 7-5,6-1 | |
| WTA Acapulco | 02/24 22:00 | 64 | [368] Giuliana Olmos v Beatriz Haddad Maia [172] | 3-6,6-3,3-6 | |
| WTA Acapulco | 02/23 22:00 | 45 | [120] Irina Khromacheva v Giuliana Olmos [368] | 1-6,5-7 | |
| ITF W25 Surprise | 02/15 17:30 | 26 | [368] Giuliana Olmos v Sesil Karatantcheva [232] | 2-6,6-2,12-14 | |
| ITF W25 Surprise | 02/12 20:35 | 25 | Giuliana Olmos v Kennedy Shaffer | 6-3,6-0 | |
| 2019 Fed Cup | 02/08 15:00 | - | [437] Montserrat Gonzalez v Giuliana Olmos [366] | 6-4,6-3 | |
| 2019 Fed Cup | 02/07 15:00 | - | Giuliana Olmos v Mell E R Gonzalez | 5-7,6-2,7-6 | |
| WTA Newport Beach | 01/23 22:05 | 25 | [369] Guiliana Olmos v Nicole Gibbs [127] | 6-7,1-6 |