Stadium: Court 7 Round: 25 Ground: Hardcourt outdoor
| Challenger Las Vegas | 2018/10/22 18:00 | Jelle Sels v Thai-Son Kwiatkowski | 4-6,6-7 |
| Challenger Las Vegas | 2018/10/21 18:00 | Pavel Krainik v Thai-Son Kwiatkowski | 4-6,2-6 |
| Challenger Las Vegas | 2018/10/20 17:00 | Daniel Nguyen v Thai-Son Kwiatkowski | 2-6,3-6 |
| Challenger Fairfield | 2018/10/07 18:15 | Thai-Son Kwiatkowski v Frederik Nielsen | 7-6,3-6,5-7 |
| Challenger Fairfield | 2018/10/06 22:15 | Marcos Giron v Thai-Son Kwiatkowski | 6-4,2-6,4-6 |
| Challenger Stockton | 2018/10/03 20:00 | Lloyd Harris v Thai-Son Kwiatkowski | 6-2,6-4 |
| Challenger Stockton | 2018/10/01 18:35 | Thai-Son Kwiatkowski v Lucas Miedler | 3-6,7-6,6-4 |
| Challenger Columbus | 2018/09/21 16:45 | Mikael Torpegaard v Thai-Son Kwiatkowski | 6-4,6-2 |
| Challenger Fairfield | 2018/10/07 18:35 | Evan King v Evan Song | 4-6,6-1,6-2 |
| Challenger Fairfield | 2018/10/06 22:40 | Marcus McDaniel v Evan Song | 4-6,3-6 |
| Challenger Stockton | 2018/09/29 23:55 | Evan Song v Tommy Paul | 5-7,6-7 |
| Challenger Columbus | 2018/09/19 17:25 | Jordan Thompson v Evan Song | 6-0,7-5 |
| Challenger Columbus | 2018/09/17 15:40 | Evan Song v Strong Kirchheimer | 7-5,3-6,6-3 |
| Challenger Columbus | 2018/09/16 17:25 | Evan Song v Evan Zhu | 6-4,6-2 |
| Challenger Columbus | 2018/09/16 00:05 | Evan Song v Aron Hiltzik | 4-6,6-2,7-5 |
| Challenger Cary | 2018/09/12 18:30 | Evan Song v James Duckworth | 3-6,6-7 |