Stadium: Court 8 輪: 45 Ground: Hardcourt outdoor
| ITF M15摩寧頓 | 2019/03/25 23:00 | Daisuke Sumizawa v 斯特凡 Skadarka | 6-3,6-7,7-10 |
| ITF M15摩寧頓 | 2019/03/24 23:00 | Daisuke Sumizawa v 扎克•奧斯本 | 6-2,6-1 |
| ITF M15摩寧頓 | 2019/03/17 23:00 | Daisuke Sumizawa v 托馬斯•博桑西奇 | 3-6,4-6 |
| ITF M15西東京 | 2019/03/12 02:35 | Rimpei Kawakami v Daisuke Sumizawa | 6-2,6-1 |
| ITF M15西東京 | 2019/03/11 03:30 | Daisuke Sumizawa v 昆汀 Folliot | 6-2,6-2 |
| ITF M15 Nishi-Tama | 2019/03/06 03:20 | Yuki Mochizuki v Daisuke Sumizawa | 6-1,7-6 |
| ITF M15 Nishi-Tama | 2019/03/05 01:00 | 清水一希 v Daisuke Sumizawa | 2-6,2-6 |
| ITF M15安寧 | 2019/01/07 01:30 | Daisuke Sumizawa v Ye Cong Mo | 1-6,4-6 |
| ITF M15筑波 | 2019/03/27 01:00 | 越智真 v Kazuki Nishiwaki | 6-3,6-1 |
| ITF M15 Kofu | 2019/03/20 05:10 | 米克•維爾德赫爾 v Kazuki Nishiwaki | 4-6,6-1,6-4 |
| ITF M15沙姆沙伊赫 | 2019/02/18 12:15 | Kazuki Nishiwaki v 喬治歐•裏卡 | 7-5,6-7,6-10 |
| ITF M15沙姆沙伊赫 | 2019/02/18 07:30 | Kazuki Nishiwaki v 馬蒂斯•埃哈德 | 6-0,6-1 |
| ITF M15安寧 | 2019/01/12 05:05 | Kazuki Nishiwaki v Agustin 維洛帝 | 6-7,2-6 |
| ITF M15安寧 | 2019/01/11 04:40 | Kazuki Nishiwaki v 尼汀•庫瑪•辛哈 | 6-7,6-2,6-4 |
| ITF M15安寧 | 2019/01/10 03:00 | 市川泰誠 v Kazuki Nishiwaki | 5-7,3-6 |
| ITF M15安寧 | 2019/01/08 04:20 | Kazuki Nishiwaki v Tianjia Guo | 6-1,6-1 |