Stadium: COURT 1 Round: 24 Ground: Hardcourt outdoor
| Challenger Calgary | 2018/10/16 16:00 | Mathias Bourgue v Kaichi Uchida | 6-7,6-2,6-2 |
| Challenger Fairfield | 2018/10/06 17:00 | Pablo Vivero Gonzalez v Kaichi Uchida | 6-3,2-6,6-3 |
| Challenger Stockton | 2018/10/04 18:45 | Jordan Thompson v Kaichi Uchida | 4-6,6-3,6-1 |
| Challenger Stockton | 2018/10/02 20:00 | Kaichi Uchida v Tommy Paul | 6-1,6-7,6-0 |
| Challenger Tiburon | 2018/09/22 18:20 | Pablo Vivero Gonzalez v Kaichi Uchida | 4-6,6-4,6-4 |
| Challenger Columbus | 2018/09/20 16:55 | Jordan Thompson v Kaichi Uchida | 6-1,7-6 |
| Challenger Columbus | 2018/09/18 19:35 | Roberto Cid Subervi v Kaichi Uchida | 6-7,6-7 |
| Challenger Cary | 2018/09/15 16:00 | Reilly Opelka v Kaichi Uchida | 6-3,6-4 |
| 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 |