Round: 25 Ground: Hardcourt indoor
| US Open, New York, USA | 2015/08/31 16:35 | Lacko, Lukas v Granollers, Marcel | 2-6,3-6,1-6 |
| Washington, USA | 2015/08/04 20:00 | Lacko, Lukas v Steve Johnson | 5-7,3-6 |
| Newport, USA | 2015/07/15 17:30 | Lacko, Lukas v Sock, Jack | 6-3,6-7,4-6 |
| Newport, USA | 2015/07/14 15:00 | Desein, Niels v Lacko, Lukas | 3-6,6-3,2-6 |
| Wimbledon, London, Great Britain | 2015/06/29 14:25 | Lacko, Lukas v Steve Johnson | 3-6,7-6,6-4,1-6,4-6 |
| ATP Halle | 2015/06/15 13:50 | Falla, Alejandro v Lacko, Lukas | 6-4,3-6,6-1 |
| ATP Halle Qual | 2015/06/14 11:30 | Lacko, Lukas v Melzer, Jurgen | 4-6,6-3,7-5 |
| ATP Halle Qual | 2015/06/13 13:50 | Lacko, Lukas v Gojowczyk, Peter | 7-6,3-6,6-4 |
| US Open, New York, USA, Qualifying | 2015/08/27 22:05 | Alexander Zverev v Langer, Nils | 6-4,6-7,6-3 |
| Challenger Marburg | 2015/07/04 13:00 | Cervantes, Inigo v Langer, Nils | 2-6,7-6,6-3 |
| Challenger Marburg | 2015/07/03 16:00 | Langer, Nils v Brands, Daniel | 6-2,6-4 |
| Challenger Marburg | 2015/07/01 16:05 | Langer, Nils v Jason Kubler | 7-6,6-3 |
| Challenger Marburg | 2015/06/30 15:55 | Zopp, Jurgen v Langer, Nils | 6-7,3-6 |
| Challenger Perugia | 2015/06/16 08:00 | Marco Cecchinato v Langer, Nils | 6-3,6-1 |
| ITF Italy F11 | 2015/05/29 14:40 | Langer, Nils v Lorenzo Sonego | 4-6,2-6 |
| ITF Italy F11 | 2015/05/28 11:00 | Langer, Nils v Trevisan, Matteo | 6-1,3-6,7-6 |