Stadium: Centre Court Round: 27 Ground: Hardcourt indoor
| Challenger Glasgow | 2018/05/03 12:00 | Lukas Lacko v Hiroki Moriya | 6-1,6-4 |
| Challenger Glasgow | 2018/05/02 12:30 | Lukas Lacko v Joris De Loore | 6-4,6-4 |
| Challenger St Brieuc | 2018/03/27 11:15 | Aldin Setkic v Lukas Lacko | 3-6,6-3,6-4 |
| ATP Miami | 2018/03/21 15:00 | Jiri Vesely v Lukas Lacko | 7-6,6-3 |
| Challenger Irving | 2018/03/15 18:00 | Lukas Lacko v Steve Johnson | 0-6,2-6 |
| Challenger Irving | 2018/03/14 18:25 | Sebastian Fanselow v Lukas Lacko | 4-6,3-6 |
| ATP Indian Wells | 2018/03/08 22:35 | Lukas Lacko v Dusan Lajovic | 4-6,4-6 |
| ATP Dubai Qual | 2018/02/24 08:15 | Lukas Lacko v Ernests Gulbis | 4-6,4-6 |
| Challenger Glasgow | 2018/05/02 13:50 | Guillermo Olaso v Lloyd Glasspool | 6-4,6-3 |
| Challenger Glasgow | 2018/04/30 11:15 | Evgeny Karlovskiy v Guillermo Olaso | 6-7,3-6 |
| ITF Spain F9 | 2018/04/19 14:00 | Guillermo Olaso v Steven Diez | 7-6,1-6,5-7 |
| ITF Spain F9 | 2018/04/17 09:25 | Guillermo Olaso v Adrien Bossel | 6-2,6-4 |
| Challenger Alicante Qual | 2018/03/31 09:55 | Carlos Gomez-Herrera v Guillermo Olaso | 2-6,7-6,7-5 |
| Challenger Marbella Qual | 2018/03/24 19:25 | Federico Gaio v Guillermo Olaso | 7-5,7-6 |
| Challenger Lille | 2018/03/23 19:00 | Guillermo Olaso v Gregoire Barrere | 0-6,1-6 |
| Challenger Lille | 2018/03/21 18:00 | Nicolas Mahut v Guillermo Olaso | 6-7,7-6,3-6 |