Stadium: Court 3 Round: 25 Ground: Clay
| Balatonalmadi, Singles Qualifying M-ITF-HUN-02A | 2019/06/19 09:50 | Ryan Nijboer v Naoki Tajima | 6-3,6-2 |
| Irpin, Singles Qualifying M-ITF-UKR-04A | 2019/05/28 07:00 | Oleg Prihodko v Naoki Tajima | 6-0,6-1 |
| Irpin, Singles Qualifying M-ITF-UKR-04A | 2019/05/21 12:40 | Nikita Mashtakov v Naoki Tajima | 6-0,7-6 |
| ITF M15 Valldoreix | 2019/05/14 13:15 | Oriol Roca Batalla v Naoki Tajima | 6-1,6-4 |
| ITF M15 Grasse | 2019/05/04 14:20 | Naoki Tajima v Hamou, Maxime | 3-6,3-6 |
| ITF M15 Grasse | 2019/05/03 10:35 | Naoki Tajima v Kirill Kivattsev | 6-7,6-4,7-6 |
| ITF M15 Grasse | 2019/05/02 13:45 | Naoki Tajima v Broville, Maxence | 6-2,6-2 |
| ITF M15 Grasse | 2019/04/30 15:10 | Tchoutakian, Maxime v Naoki Tajima | 4-6,4-6 |
| ITF M15 Kamen | 2019/06/24 12:00 | Staeheli, Luca v Niklas Schell | 7-6,7-5 |
| Reggio Emilia, Singles Qualifying M-ITF-ITA-11A | 2019/05/27 10:00 | Staeheli, Luca v Di Nicola, Gianluca | 4-6,2-6 |
| ITF - M15 Sharm El Sheikh | 2019/04/10 11:40 | Struvay, Eduardo v Staeheli, Luca | 6-4,6-2 |
| ITF - M15 Sharm El Sheikh | 2019/04/04 09:15 | Guttau, Niklas v Staeheli, Luca | 6-2,6-4 |
| ITF - M15 Sharm El Sheikh | 2019/04/03 14:10 | Staeheli, Luca v S D Prajwal Dev | 2-6,6-3,6-0 |
| ITF - M15 Sharm El Sheikh | 2019/04/02 08:00 | Staeheli, Luca v Yannik Steinegger | 7-5,6-4 |
| ITF - M15 Sharm El Sheikh | 2019/03/25 11:00 | Mattia Bellucci v Staeheli, Luca | 6-4,6-2 |
| ITF - M15 Sharm El Sheikh | 2019/03/25 08:00 | Daniel De Jonge v Staeheli, Luca | 3-6,6-7 |