Stadium: Court 1 Round: 25 Ground: Clay
| ITF Austria F3 | 2018/07/15 08:00 | Neil Oberleitner v Vejvara, Lukas | 3-6,2-6 |
| ITF Austria F3 | 2018/07/14 12:30 | Aplienz, Philip v Vejvara, Lukas | 4-6,2-6 |
| ITF Austria F3 | 2018/07/14 07:15 | Vejvara, Lukas v Jonathan Stenberg | 7-5,4-6,6-3 |
| ITF Czech Republic F3 Qual | 2018/05/27 08:00 | Stepanek, Antonin v Vejvara, Lukas | 6-4,7-5 |
| ITF Czech Republic F2 Qual | 2018/05/21 08:00 | Vejvara, Lukas v Simon Beaupain | 4-6,4-6 |
| ITF Czech Republic F2 Qual | 2018/05/20 08:00 | Vejvara, Lukas v Dusek, Ondrej | 6-1,6-4 |
| Tunisia F16, Singles Qualifying | 2018/04/23 09:00 | Vejvara, Lukas v Tiran Sanghera | 4-6,6-3,3-6 |
| Tunisia F16, Singles Qualifying | 2018/04/22 12:00 | Vejvara, Lukas v Maxim Krapivin | 6-4,6-3 |
| ITF Austria F1 | 2018/07/04 10:00 | Pena Lopez, Manuel v Schmidt, Gabriel | 6-4,6-3 |
| ITF Austria F1 | 2018/07/02 10:55 | Schmidt, Gabriel v Bangratz, Johannes | 6-4,6-1 |
| ITF Austria F1 | 2018/07/01 07:30 | Schmidt, Gabriel v Ragazzi, Alessandro | 7-5,6-2 |
| ITF Austria F1 | 2018/06/30 11:00 | Schmidt, Gabriel v Tomas, Aleksandar | 6-4,6-0 |
| Turkey F17, Singles Qualifying | 2018/05/02 07:30 | Jonas Trinker v Schmidt, Gabriel | 6-4,3-6,7-6 |
| Turkey F16, Singles Qualifying | 2018/04/24 07:30 | Schmidt, Gabriel v Galoppini, Davide | 5-7,0-6 |
| Turkey F16, Singles Qualifying | 2018/04/23 07:30 | Kolly, Bastien v Schmidt, Gabriel | 4-6,2-6 |
| Turkey F16, Singles Qualifying | 2018/04/21 09:30 | Pirolt, Pietro v Schmidt, Gabriel | 3-6,0-6 |