Round: 25 Ground: Hardcourt indoor
| Challenger Brest | 2015/10/23 12:50 | Igor Sijsling v Luca Vanni | 5-7,6-4,6-7 |
| Challenger Brest | 2015/10/22 11:45 | Igor Sijsling v Maxime Tabatruong | 6-2,6-0 |
| Challenger Brest | 2015/10/20 14:40 | John-Patrick Smith v Igor Sijsling | 7-6,6-7,4-6 |
| Challenger Orleans | 2015/09/30 20:10 | Igor Sijsling v Marco Chiudinelli | 3-6,7-5,3-6 |
| Challenger Como | 2015/09/01 09:30 | Fernando Romboli v Igor Sijsling | 6-3,1-6,6-3 |
| US Open Qual | 2015/08/26 17:30 | Nicolas Almagro v Igor Sijsling | 7-6,6-3 |
| Wimbledon | 2015/06/30 13:05 | Sam Querrey v Igor Sijsling | 7-5,6-3,6-4 |
| Wimbledon Qual | 2015/06/24 10:00 | Jurgen Melzer v Igor Sijsling | 6-1,5-7,3-6 |
| Challenger Orleans | 2015/09/28 19:40 | Alexandre Sidorenko v Yannick Mertens | 3-6,6-4,6-4 |
| US Open Qual | 2015/08/26 15:00 | Andrea Arnaboldi v Yannick Mertens | 6-3,6-4 |
| Challenger Segovia | 2015/08/07 10:50 | Marcel Granollers v Yannick Mertens | 6-2,6-4 |
| Challenger Segovia | 2015/08/05 12:30 | Yannick Mertens v Alexander Kudryavtsev | 6-2,6-2 |
| Challenger Segovia | 2015/08/04 08:30 | Yannick Mertens v Sebastien Boltz | 6-4,6-2 |
| Challenger Recanati | 2015/07/24 15:00 | Yannick Mertens v Marton Fucsovics | 4-6,4-6 |
| Challenger Recanati | 2015/07/22 14:00 | Alexander Lazov v Yannick Mertens | 0-6,3-6 |
| Challenger Recanati | 2015/07/21 10:30 | Di Wu v Yannick Mertens | 6-2,5-7,3-6 |