Stadium: Court 5 Round: 25
| ITF Women Osprey | 2018/05/25 13:00 | Stewart, Katerina v Usue Maitane Arconada | 7-6,6-7,4-6 |
| ITF Women Osprey | 2018/05/24 13:00 | Stewart, Katerina v Gauff, Cori | 7-6,6-3 |
| ITF Women Osprey | 2018/05/23 15:55 | Stewart, Katerina v Dasha Ivanova | 6-3,6-1 |
| ITF Women Charleston | 2018/05/05 16:55 | Stewart, Katerina v Taylor Townsend | 4-6,1-6 |
| ITF Women Charleston | 2018/05/04 14:00 | Jamie Loeb v Stewart, Katerina | 6-7,0-6 |
| ITF Women Charleston | 2018/05/03 16:35 | Stewart, Katerina v Gibbs, Nicole | 6-0,6-1 |
| ITF Women Charleston | 2018/05/02 14:00 | Ana Sofia Sanchez v Stewart, Katerina | 3-6,2-6 |
| ITF Women Charleston Qual | 2018/05/01 14:00 | Stewart, Katerina v Nefedova, Anastasia Evgenyevna | 6-2,6-0 |
| ITF Women Osprey | 2018/05/24 13:00 | Khazaniuk, Deniz v Ann Li | 6-4,6-3 |
| ITF Women Osprey | 2018/05/23 17:35 | Ksenia Laskutova v Ann Li | 7-5,0-6,7-10 |
| Indian Harbour Beach, Simples W-WITF-USA-10A | 2018/04/11 17:30 | Ann Li v Caroline Dolehide | 4-6,5-7 |
| ITF Women Indian Harbour Qual | 2018/04/10 13:00 | Ann Li v Boren, Brynn | 6-3,6-2 |
| ITF Women Indian Harbour Qual | 2018/04/09 14:00 | Ann Li v Mara Schmidt | 6-0,6-0 |
| ITF Women Indian Harbour Qual | 2018/04/08 14:15 | Ann Li v Gammie, Kayla | 6-1,6-1 |
| WTA Miami Qual | 2018/03/19 20:10 | Sofia Kenin v Ann Li | 6-2,7-5 |
| Indian Wells, USA, Qualifying | 2018/03/05 20:45 | Niculescu, Monica v Ann Li | 6-3,6-0 |