Round: 26 Ground: Hardcourt outdoor
| ITF - M15 Tsukuba | 2019/03/26 01:00 | Pol Wattanakul v Mark Whitehouse | 2-6,0-6 |
| ITF - M25 Glasgow | 2019/02/18 09:30 | Matteo Martineau v Mark Whitehouse | 6-2,6-0 |
| ITF - M25 Barnstaple | 2019/02/12 14:25 | Mark Whitehouse v Hugo Grenier | 4-6,2-6 |
| ITF - M25 Barnstaple | 2019/02/11 17:15 | Alexander Ritschard v Mark Whitehouse | 3-6,1-6 |
| ITF - M25 Barnstaple | 2019/02/11 13:45 | Jonathan Gray v Mark Whitehouse | 5-7,6-7 |
| ITF M15 Kaarst | 2019/02/06 11:00 | Mark Whitehouse v Petr Nouza | 6-2,4-6,2-6 |
| ITF - M15 Veigy-Foncenex | 2019/01/22 11:00 | Mark Whitehouse v Raphael Baltensperger | 4-6,4-6 |
| ITF - EUA F35 | 2018/12/06 18:15 | Maxime Cressy v Mark Whitehouse | 6-3,6-1 |
| ITF - M15 Tsukuba | 2019/03/27 03:25 | Issei Okamura v Naoki Tajima | 3-6,4-6 |
| ITF M15 Kofu | 2019/03/21 03:40 | Yusuke Takahashi v Naoki Tajima | 6-3,6-2 |
| ITF M15 Kofu | 2019/03/20 02:25 | Naoki Tajima v Tomohiro Masabayashi | 4-6,6-1,6-2 |
| ITF - M15 Nishi-Tokyo | 2019/03/13 03:50 | Shintaro Imai v Naoki Tajima | 6-1,6-4 |
| ITF M15 Nishi-Tama | 2019/03/08 04:30 | Sho Shimabukuro v Naoki Tajima | 6-3,7-5 |
| ITF M15 Nishi-Tama | 2019/03/05 05:25 | Naoki Tajima v Shinji Hazawa | 7-5,6-3 |
| ITF - M15 Anning | 2019/01/18 03:00 | Yan Bai v Naoki Tajima | 3-6,6-1,6-0 |
| ITF - M15 Anning | 2019/01/17 03:00 | Naoki Tajima v Michael Zhu | 6-2,6-3 |