| ITF M15 Lucknow | 03/03 04:00 | 25 | Luca Castelnuovo v Niki Kaliyanda Poonacha | 4-6,6-3,6-2 | |
| ITF M15 Grenoble | 02/07 11:30 | 54 | Luca Castelnuovo v Nazim Makhlouf | 6-7,2-6 | |
| ITF M25 Villena | 01/31 12:00 | 62 | Luca Castelnuovo v Javier Molino | 3-6,3-6 | |
| ITF M15 Monastir | 12/09 08:30 | 25 | Luca Castelnuovo v Colin Sinclair | Retired | |
| ITF M15 Heraklion | 11/24 08:30 | 44 | Luca Castelnuovo v Sebastian Gima | 6-2,3-6,5-10 | |
| ITF M15 Heraklion | 11/16 10:00 | 44 | Federico Arnaboldi v Luca Castelnuovo | 6-4,6-2 | |
| ITF M15 Heraklion | 11/15 08:00 | 44 | Yair Sarouk v Luca Castelnuovo | 4-6,4-6 | |
| ITF M15 Heraklion | 11/08 12:00 | 44 | Dominik Recek v Luca Castelnuovo | 6-2,4-6,10-7 | |
| ITF M15 Heraklion | 11/01 07:30 | 44 | Luca Castelnuovo v Gerardo L Villasenor | 2-6,0-6 | |
| ITF M15 Sarreguemines | 10/25 09:15 | 54 | Luca Castelnuovo v Maxence Beauge | 3-6,6-3,9-11 | |
| ITF M15 Forbach | 09/30 10:05 | 25 | Luca Castelnuovo v Roy Smith | 4-6,4-6 | |
| ITF M15 Forbach | 09/28 15:25 | 54 | Luca Castelnuovo v Alexis Canter | 5-7,6-4,11-9 | |
| ITF M15 Forbach | 09/28 07:00 | 54 | Luca Castelnuovo v Quin Verstegen | 6-3,6-1 | |
| Swiss Tennis Masters | 07/06 15:00 | 1 | Luca Castelnuovo v Remy Bertola | 5-7,1-6 | |
| ITF M25 Las Vegas | 03/03 19:30 | 25 | [415] Justin Butsch v Luca Castelnuovo [414] | 6-3,3-6,6-3 | |
| Challenger Columbus | 02/25 16:20 | 24 | [353] Alexander Cozbinov v Luca Castelnuovo [429] | 6-3,6-2 | |
| Challenger Columbus | 02/24 15:00 | 28 | [225] Ruan Roelofse v Luca Castelnuovo [429] | Walkover | |
| ITF M15 Cancun | 02/19 14:00 | 25 | [372] George Goldhoff v Luca Castelnuovo [424] | 6-1,6-1 | |
| ITF M15 Monastir | 01/28 12:15 | 25 | Luca Castelnuovo v Moez Echargui | 6-4,3-6,5-7 | |
| ITF M15 Monastir | 01/22 09:00 | 25 | [451] Aziz Dougaz v Luca Castelnuovo [434] | 6-3,7-6 | |
| ITF M15 Hong Kong | 01/09 03:25 | 26 | Cing-Yang Meng v Luca Castelnuovo | 7-6,6-4 | |
| ITF M15 Hong Kong | 01/08 08:30 | 25 | [428] Ray Ho v Luca Castelnuovo [474] | 6-7,3-6 | |
| Challenger Playford 2 | 10/28 01:00 | 24 | Alexander Crnokrak v Luca Castelnuovo | 6-3,6-4 | |
| Challenger Traralgon | 10/23 00:35 | 25 | [87] Yasutaka Uchiyama v Luca Castelnuovo [368] | 6-4,6-2 | |
| Challenger Traralgon | 10/21 03:55 | 24 | Wishaya Trong'kul v Luca Castelnuovo | 3-6,6-7 | |
| ITF M25 Toowoomba | 10/10 01:00 | 26 | Dayne Kelly v Luca Castelnuovo | 6-3,6-4 | |
| ITF M25 Toowoomba | 10/08 01:40 | 25 | [350] Luca Castelnuovo v Vladyslav Orlov [427] | 6-7,7-6,6-0 | |
| ITF M25 Brisbane | 10/02 06:10 | 25 | Tristan Schoolkate v Luca Castelnuovo | 4-6,6-4,7-6 | |
| ITF M15 Nanchang | 09/21 02:00 | 28 | Dusty H. Boyer v Luca Castelnuovo | 6-4,3-6,6-4 | |
| ITF M15 Nanchang | 09/20 02:00 | 27 | Yuanfeng Li v Luca Castelnuovo | 6-3,5-7,3-6 |