Round: 26 Ground: Hardcourt indoor
| 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 |
| Wimbledon Qual | 2015/06/22 14:30 | Roberto Carballes Baena v Igor Sijsling | 4-6,7-5,3-6 |
| Challenger Heilbronn | 2015/05/12 11:35 | Yoshihito Nishioka v Igor Sijsling | 6-4,6-7,7-6 |
| Challenger St Brieuc | 2015/04/07 09:00 | Uladzimir Ignatik v Igor Sijsling | 2-6,6-4,6-4 |
| ATP Delray Beach | 2015/02/17 18:10 | Yoshihito Nishioka v Igor Sijsling | 7-5,6-1 |
| Challenger Orleans | 2015/09/28 09:00 | Marco Chiudinelli v Norbert Gombos | 6-7,6-4,6-2 |
| US Open Qual | 2015/08/28 17:10 | Marco Chiudinelli v Tommy Paul | 1-6,4-6 |
| US Open Qual | 2015/08/27 19:10 | Inigo C Huegun v Marco Chiudinelli | 3-6,2-6 |
| Challenger Segovia | 2015/08/09 10:50 | Evgeny Donskoy v Marco Chiudinelli | 7-6,6-3 |
| Challenger Segovia | 2015/08/08 11:35 | Marco Chiudinelli v Connor Smith | 6-7,6-2,6-4 |
| Challenger Segovia | 2015/08/07 14:00 | Marco Chiudinelli v Egor Gerasimov | 6-3,5-7,7-5 |
| Challenger Segovia | 2015/08/05 16:00 | Denys Molchanov v Marco Chiudinelli | 2-6,6-7 |
| ATP Newport Qual | 2015/07/11 18:15 | Aliaksandr Bury v Marco Chiudinelli | 1-6,4-6 |