Stadium: Center Court Round: 24 Ground: Hardcourt outdoor
| Challenger Phoenix | 2019/03/11 17:00 | Dominik Kellovsky v Nathan Ponwith | 4-6,2-6 |
| ITF USA F26 Qual | 2018/09/22 19:00 | Eric Samuelsson v Nathan Ponwith | 6-4,7-6 |
| ITF USA F26 Qual | 2018/09/21 21:30 | Nathan Ponwith v Jeremy Moser | 6-1,6-1 |
| ITF USA F25 | 2018/09/17 18:00 | Nathan Ponwith v Justin Roberts | 5-7,6-2,4-6 |
| ITF USA F25 | 2018/09/16 17:30 | William Genesen v Nathan Ponwith | 6-7,4-6 |
| ITF USA F1 Qual | 2018/01/01 18:30 | Gage Brymer v Nathan Ponwith | 6-4,6-4 |
| ITF USA F1 Qual | 2017/12/31 17:00 | Nathan Ponwith v Brandon Lam | 6-2,7-6 |
| ITF USA F23 Qual | 2017/07/02 15:00 | Nathan Ponwith v Ryan Peniston | 5-7,4-6 |
| ATP Indian Wells | 2019/03/09 00:10 | Tatsuma Ito v Jared Donaldson | 3-6,5-7 |
| ATP Indian Wells | 2019/03/06 23:25 | Tatsuma Ito v JC Aragone | 7-6,6-3 |
| ATP Indian Wells | 2019/03/06 04:45 | Casper Ruud v Tatsuma Ito | 7-6,1-6,4-6 |
| Challenger Yokohama | 2019/02/28 03:25 | Tatsuma Ito v Duckhee Lee | 3-6,6-4,6-7 |
| Challenger Yokohama | 2019/02/27 03:00 | Tatsuma Ito v Moez Echargui | 6-0,7-5 |
| Challenger Bangkok | 2019/02/15 04:00 | Soonwoo Kwon v Tatsuma Ito | 3-6,6-4,1-6 |
| Challenger Bangkok | 2019/02/14 03:00 | Alejandro Davidovich Fokina v Tatsuma Ito | 6-1,3-6,4-6 |
| Challenger Bangkok | 2019/02/13 03:00 | David Perez Sanz v Tatsuma Ito | 4-6,2-6 |