Stadium: COURT 1 Round: 25 Ground: Hardcourt indoor
| ATP Halle Qual | 2017/06/17 09:00 | Ruben Bemelmans v Lukas Lacko | 4-6,3-6 |
| ATP St Petersburg | 2018/09/17 10:00 | Ruben Bemelmans v Adrian Menendez-Maceiras | 6-4,2-6,3-6 |
| ATP St Petersburg | 2018/09/16 11:45 | Ruben Bemelmans v Egor Gerasimov | 6-2,4-6,7-6 |
| Challenger Chicago | 2018/09/07 18:55 | Ruben Bemelmans v Denis Istomin | 3-6,4-6 |
| Challenger Chicago | 2018/09/06 19:15 | Ruben Bemelmans v Kaichi Uchida | 6-3,6-4 |
| Challenger Chicago | 2018/09/05 18:05 | Ruben Bemelmans v Hugo Nys | 7-5,7-6 |
| US Open | 2018/08/28 18:00 | Ruben Bemelmans v Jaume Munar | 7-5,3-6,6-7,6-2,1-6 |
| US Open | 2018/08/24 17:00 | Facundo Bagnis v Ruben Bemelmans | 6-3,6-7,6-2 |
| US Open | 2018/08/23 15:00 | Constant Lestienne v Ruben Bemelmans | 4-6,3-6 |
| US Open | 2018/08/27 21:40 | Vasek Pospisil v Lukas Lacko | 7-5,6-3,6-2 |
| ATP Winston-Salem | 2018/08/20 21:15 | Horacio Zeballos v Lukas Lacko | 7-6,7-5 |
| ATP Washington | 2018/07/31 20:55 | Lukas Lacko v Denis Kudla | 7-6,1-6,4-6 |
| ATP Atlanta | 2018/07/25 17:00 | Ryan Harrison v Lukas Lacko | 2-6,6-2,6-3 |
| ATP Atlanta | 2018/07/23 19:40 | Lukas Lacko v Prajnesh Gunneswaran | 6-2,6-2 |
| Wimbledon | 2018/07/04 13:30 | Roger Federer v Lukas Lacko | 6-4,6-4,6-1 |
| Wimbledon | 2018/07/02 17:00 | Lukas Lacko v Benjamin Bonzi | 4-6,6-3,7-6,6-4 |
| ATP Eastbourne | 2018/06/30 14:00 | Lukas Lacko v Mischa Zverev | 4-6,4-6 |