Stadium: Court 7 Round: 44 Ground: Hardcourt outdoor
| ITF Women Waco | 2017/11/07 20:55 | Kostova, Elitsa v Gibbs, Nicole | 2-6,5-7 |
| ITF Women Las Vegas | 2018/11/07 19:35 | Kostova, Elitsa v Fanny Stollar | 3-6,3-6 |
| ITF Women Toronto | 2018/10/31 14:00 | Kostova, Elitsa v Zimmermann, Kimberley | 2-6,4-6 |
| ITF Women Toronto | 2018/10/30 15:45 | Kostova, Elitsa v Maja Chwalinska | 7-5,4-6,6-3 |
| ITF Women Saguenay | 2018/10/23 14:00 | Kostova, Elitsa v Jada Bui | 4-6,3-6 |
| WTA Luxembourg | 2018/10/14 11:50 | Kostova, Elitsa v Arantxa Rus | 2-6,3-6 |
| WTA Luxembourg | 2018/10/13 19:35 | Indy De Vroome v Kostova, Elitsa | 3-6,2-6 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/10/02 13:50 | Reka-Luca Jani v Kostova, Elitsa | 7-5,4-6,6-1 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2018/09/28 12:00 | Kostova, Elitsa v Samsonova, Liudmila | 3-6,4-6 |
| Brisbane, Australie | 2018/12/28 03:20 | Gibbs, Nicole v Anastasia Potapova | 7-5,3-6,2-6 |
| Houston, USA | 2018/11/15 20:20 | Lauren Davis v Gibbs, Nicole | 2-6,6-4,6-4 |
| Houston, USA | 2018/11/13 23:10 | Muhammad, Asia v Gibbs, Nicole | 6-7,6-4,1-6 |
| ITF Women Las Vegas | 2018/11/11 22:30 | Bencic, Belinda v Gibbs, Nicole | 7-5,6-1 |
| ITF Women Las Vegas | 2018/11/10 19:25 | Giuliana Olmos v Gibbs, Nicole | 2-6,4-6 |
| ITF Women Las Vegas | 2018/11/09 19:30 | Gibbs, Nicole v Lao, Danielle | 6-7,6-4,6-3 |
| ITF Women Las Vegas | 2018/11/08 18:00 | Gibbs, Nicole v Grace Min | 6-2,7-5 |
| ITF Women Las Vegas | 2018/11/07 22:15 | Gibbs, Nicole v Sanchez, Maria | 7-5,6-0 |