Stadium: Stadium 4 Round: 24 Ground: Hardcourt outdoor
| Challenger Morelos | 2019/02/20 16:00 | Gonzalo Escobar v Thai-Son Kwiatkowski | 5-7,6-4,6-2 |
| Challenger Dallas | 2019/02/06 02:00 | Thai-Son Kwiatkowski v Thomaz Bellucci | 4-6,7-5,5-7 |
| Challenger Dallas | 2019/02/05 01:00 | Jelle Sels v Thai-Son Kwiatkowski | 6-4,6-7,4-6 |
| Challenger Newport Beach | 2019/01/22 18:00 | Thai-Son Kwiatkowski v Victor Estrella Burgos | 3-6,4-6 |
| Challenger Da Nang | 2019/01/11 06:00 | Thai-Son Kwiatkowski v Matteo Viola | 7-5,6-7,2-6 |
| Challenger Da Nang | 2019/01/10 06:00 | Tsung-Hua Yang v Thai-Son Kwiatkowski | 4-6,6-7 |
| Challenger Da Nang | 2019/01/09 05:00 | Viktor Durasovic v Thai-Son Kwiatkowski | 5-7,6-7 |
| Challenger Da Nang | 2019/01/07 10:00 | Youssef Hossam v Thai-Son Kwiatkowski | 5-7,4-6 |
| ATP Delray Beach | 2019/02/17 17:45 | Donald Young v Daniel Evans | 2-6,6-7 |
| ATP Delray Beach | 2019/02/16 18:35 | Bjorn Fratangelo v Donald Young | 2-6,6-7 |
| Challenger Cleveland | 2019/01/30 02:55 | Roy Smith v Donald Young | 6-4,0-6,7-6 |
| Challenger Newport Beach | 2019/01/26 18:00 | Brayden Schnur v Donald Young | 6-2,3-6,7-6 |
| Challenger Newport Beach | 2019/01/25 22:55 | Donald Young v Collin Altamirano | 6-2,6-1 |
| Challenger Newport Beach | 2019/01/24 20:40 | JC Aragone v Donald Young | 3-6,4-6 |
| Challenger Newport Beach | 2019/01/22 19:45 | Donald Young v Noah Rubin | 6-4,6-3 |
| Challenger Newport Beach | 2019/01/21 18:00 | Patrick Kypson v Donald Young | 3-6,2-6 |