| Challenger Quito | 09/13 16:20 | 14 | Luca Castelnuovo v Hugo Minda | 6-4,6-3 | |
| ITF M25 Sierre | 09/03 10:00 | 27 | Rinky Hijikata v Luca Castelnuovo | 6-3,3-6,7-5 | |
| ITF M25 Sierre | 09/02 07:55 | 26 | [334] Luca Castelnuovo v Moez Echargui [499] | 7-6,7-6 | |
| ITF M25 Sierre | 08/31 16:30 | 25 | Luca Castelnuovo v Gian Luca Tanner | 7-5,6-3 | |
| ITF M25 Muttenz | 08/19 10:35 | 26 | [331] Luca Castelnuovo v Oscar Jose Gutierrez [428] | 1-6,2-6 | |
| ITF M25 Muttenz | 08/18 12:50 | 25 | Gabriele Moghini v Luca Castelnuovo | 6-7,1-6 | |
| Challenger Tampere | 07/18 10:20 | 14 | [343] Kyrian Jacquet v Luca Castelnuovo [424] | 6-7,6-1,6-0 | |
| Challenger Amersfoort | 07/11 14:25 | 14 | [350] Michael Geerts v Luca Castelnuovo [419] | 7-6,6-2 | |
| ITF M15 Poprad | 07/08 08:00 | 26 | Luca Castelnuovo v Roman A Burruchaga | 2-6,3-6 | |
| ITF M15 Poprad | 07/07 10:10 | 25 | Luca Castelnuovo v Jan Jermar | 7-6,6-2 | |
| ITF M25 Wroclaw | 06/27 15:30 | 62 | Luca Castelnuovo v Piotr Grynkowski | 6-4,6-7,7-10 | |
| ITF M25 Klosters | 06/23 10:30 | 25 | Luca Castelnuovo v Tim Handel | 6-7,2-6 | |
| ITF M25 Klosters | 06/21 07:00 | 54 | Luca Castelnuovo v Leopold Zima | 6-2,3-6,10-6 | |
| ITF M25 Klosters | 06/20 07:00 | 54 | Luca Castelnuovo v Nico Jaeger | 4-6,6-3,11-9 | |
| ITF M15 Gaiba | 06/08 13:35 | 54 | Luca Castelnuovo v Osgar O'Hoisin | 3-6,7-5,8-10 | |
| ITF M15 Gaiba | 06/07 10:00 | 54 | Luca Castelnuovo v Gregorio De Gasper | 6-4,6-4 | |
| ITF M15 Kouvola | 05/28 07:15 | 27 | Luca Castelnuovo v Naoki Tajima | 3-6,2-6 | |
| ITF M15 Kouvola | 05/27 11:25 | 26 | Luca Castelnuovo v Simonas Zukauskas | 6-1,6-3 | |
| ITF M15 Kouvola | 05/26 14:40 | 25 | Luca Castelnuovo v Roni Mikael Hietaranta | 6-3,4-6,6-3 | |
| ITF M15 Tbilisi | 05/18 07:00 | 25 | Yurii Dzhavakian v Luca Castelnuovo | 7-6,0-6,7-6 | |
| ITF M15 Jerusalem | 05/12 08:15 | 25 | [398] Edan Leshem v Luca Castelnuovo [423] | 7-5,7-5 | |
| ITF M15 Ramat Hasharon | 05/06 07:00 | 26 | Zane Khan v Luca Castelnuovo | 6-3,6-2 | |
| ITF M15 Ramat Hasharon | 05/05 11:05 | 25 | Gilad Tamar v Luca Castelnuovo | 6-7,4-6 | |
| ITF M15 New Delhi | 04/01 04:30 | 26 | Lorenzo Bocchi v Luca Castelnuovo | Retired | |
| ITF M15 New Delhi | 03/31 05:30 | 25 | S D Prajwal Dev v Luca Castelnuovo | 4-6,3-6 | |
| ITF M15 Pune | 03/24 06:50 | 25 | Ishaque Eqbal v Luca Castelnuovo | Retired | |
| ITF M15 Indore | 03/12 04:00 | 27 | Aidan Mchugh v Luca Castelnuovo | 6-2,6-2 | |
| ITF M15 Indore | 03/11 04:00 | 26 | Dalwinder Singh v Luca Castelnuovo | 4-6,3-6 | |
| ITF M15 Indore | 03/10 07:20 | 25 | Muthu A Senthilkumar v Luca Castelnuovo | 4-6,4-6 | |
| ITF M15 Lucknow | 03/04 09:05 | 26 | Luca Castelnuovo v Zane Khan | 3-6,6-7 |