Stadium: Grandstand Round: 54 Ground: Clay
| ITF W25 Orlando | 2021/11/03 14:00 | Marine Partaud v Madison Sieg | 6-0,6-0 |
| ITF W80 Macon | 2021/10/18 15:50 | Conny Perrin v Madison Sieg | 6-2,1-6,10-4 |
| ITF W15 Cancun | 2021/10/16 15:00 | Darja Semenistaja v Madison Sieg | 6-2,6-4 |
| ITF W15 Cancun | 2021/10/15 15:00 | Madison Sieg v Yuliana Monroy | 6-1,6-4 |
| ITF W15 Cancun | 2021/10/12 17:00 | Alice Gillan v Madison Sieg | 4-6,2-6 |
| ITF W15 Cancun | 2021/10/07 15:00 | Madison Sieg v Taylor Ng | 6-4,5-7,1-6 |
| ITF W15 Cancun | 2021/10/05 15:30 | Jessica Hinojosa Gomez v Madison Sieg | 6-3,3-6,5-7 |
| ITF W15 L'Aquila | 2021/06/22 12:15 | Tatiana Pieri v Madison Sieg | 6-3,6-1 |
| ITF W25 Naples | 2021/11/16 14:30 | Elizabeth Mandlik v Alexa Graham | 6-7,6-3,8-10 |
| ITF W25 Daytona Beach | 2021/11/11 14:30 | Alycia Parks v Elizabeth Mandlik | 1-6,7-5,6-2 |
| ITF W25 Daytona Beach | 2021/11/10 14:30 | Amina Anshba v Elizabeth Mandlik | 3-6,6-3,1-6 |
| ITF W25 Orlando | 2021/11/03 15:15 | Maegan Manasse v Elizabeth Mandlik | 4-6,7-5,6-3 |
| ITF W80 Tyler | 2021/10/27 19:55 | Elizabeth Mandlik v Katarzyna Kawa | 5-7,4-6 |
| ITF W80 Tyler | 2021/10/26 16:40 | Quinn Gleason v Elizabeth Mandlik | 0-6,4-6 |
| ITF W80 Tyler | 2021/10/25 22:20 | Ji-Hee Choi v Elizabeth Mandlik | 1-6,1-6 |
| ITF W80 Macon | 2021/10/19 14:00 | Whitney Osuigwe v Elizabeth Mandlik | 1-6,6-4,10-7 |