| ITF Netherlands F4 | 2014/07/04 16:00 | Westerhof, Boy v Niels Lootsma | 4-6,6-0,6-2 |
| ITF Netherlands F2 | 2015/06/25 11:00 | Reuter, Yannik v Niels Lootsma | 6-4,6-1 |
| ITF Netherlands F2 | 2015/06/23 14:00 | Niels Lootsma v Barry, Sam | 4-6,7-6,7-6 |
| ITF Netherlands F1 | 2015/06/16 10:00 | Barry, Sam v Niels Lootsma | 6-2,6-4 |
| ITF Italy F13 | 2015/06/09 16:45 | Fortuna, Claudio v Niels Lootsma | 4-6,7-6,6-4 |
| ITF Great Britain F4 | 2015/03/19 10:30 | Niels Lootsma v Mertens, Yannick | 5-7,3-6 |
| ITF Great Britain F4 | 2015/03/17 10:00 | Niels Lootsma v Gabb, Richard | 3-6,6-4,6-4 |
| ITF Italy F1 | 2015/02/21 17:25 | Niels Lootsma v Grigelis, Laurynas | 4-6,2-6 |
| ITF Italy F1 | 2015/02/20 13:00 | Niels Lootsma v Lorenzo Sonego | 2-6,7-6,7-6 |
| Wimbledon Qual | 2015/06/24 10:00 | Westerhof, Boy v Elias Ymer | 6-7,5-7 |
| Wimbledon Qual | 2015/06/22 16:35 | Clezar, Guilherme v Westerhof, Boy | 5-7,4-6 |
| ITF Netherlands F1 | 2015/06/18 17:50 | Westerhof, Boy v Alexey Vatutin | 4-6,2-6 |
| ITF Netherlands F1 | 2015/06/18 12:25 | Westerhof, Boy v Neis, Fabricio | 6-4,6-1 |
| ITF China F2 Qual | 2015/04/14 02:00 | Westerhof, Boy v Kim, Young Seok | 6-2,6-4 |
| ITF China F2 | 2015/04/10 03:20 | Kim, Young Seok v Westerhof, Boy | 6-4,2-6,6-4 |
| ITF China F2 | 2015/04/08 02:00 | Ning, Yuqing v Westerhof, Boy | 1-6,2-6 |
| ITF China F2 | 2015/04/07 02:00 | He, Yecong v Westerhof, Boy | 3-6,1-6 |