Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF Qatar F5 | 2018/12/15 13:00 | Tak Khunn Wang v Goncalo Oliveira | 6-3,6-3 |
| ITF Qatar F5 | 2018/12/14 12:00 | Jaume Pla Malfeito v Goncalo Oliveira | 4-6,4-6 |
| ITF Qatar F5 | 2018/12/13 12:00 | Antoine Bellier v Goncalo Oliveira | 4-6,2-6 |
| ITF Qatar F5 | 2018/12/12 12:00 | Mick Lescure v Goncalo Oliveira | 4-6,3-6 |
| ITF Qatar F5 | 2018/12/11 13:40 | Constantin Bittoun Kouzmine v Goncalo Oliveira | 3-6,6-7 |
| ITF Qatar F4 | 2018/12/08 13:00 | Aslan Karatsev v Goncalo Oliveira | 3-6,5-7 |
| ITF Qatar F4 | 2018/12/07 12:00 | Michail Pervolarakis v Goncalo Oliveira | 6-7,4-6 |
| ITF Qatar F4 | 2018/12/06 12:00 | Zizou Bergs v Goncalo Oliveira | 2-6,4-6 |
| ITF Qatar F6 | 2018/12/17 10:00 | Constantin Schmitz v Bart Van Den Berg | 6-3,6-3 |
| ITF Qatar F5 | 2018/12/10 13:40 | Peter Kobelt v Constantin Schmitz | 6-2,6-7,6-1 |
| ITF Qatar F5 | 2018/12/09 12:00 | Ivailo Keremedchiev v Constantin Schmitz | 6-7,4-6 |
| ITF Qatar F4 | 2018/12/03 13:55 | Constantin Schmitz v Niklas Schell | 4-6,3-6 |
| ITF Qatar F4 | 2018/12/02 14:55 | Constantin Schmitz v Eric Lavaud | 6-1,6-0 |
| ITF Germany F15 | 2018/10/09 11:00 | Jonathan Binding v Constantin Schmitz | 3-6,6-3,6-1 |
| ITF Germany F14 | 2018/10/05 11:45 | Paul Cayre v Constantin Schmitz | 6-3,6-2 |
| ITF Germany F14 | 2018/10/04 13:15 | Sandro Kopp v Constantin Schmitz | 2-6,2-6 |