Stadium: Court Cascais Round: 27 Ground: Clay
| ATP Estoril MD | 2018/05/02 11:00 | Lopez/Marrero v Koolhof/Sitak | 7-6,4-6,3-10 |
| ATP Budapest MD | 2018/04/26 09:00 | Koolhof/Sitak v Matkowski/Monroe | 3-6,4-6 |
| ATP Budapest MD | 2018/04/25 09:00 | Mektic/Peya v Koolhof/Sitak | 5-7,7-6,7-10 |
| ATP Marrakech MD | 2018/04/11 16:50 | Koolhof/Sitak v Sharan/Struff | 6-7,3-6 |
| Challenger Alicante MD | 2018/04/06 14:45 | Koolhof/Sitak v Andreozzi/Behar | 6-3,6-2 |
| Challenger Alicante MD | 2018/04/05 09:30 | Koolhof/Sitak v Martinez Portero/Vega Hernandez | 5-7,6-4,10-5 |
| Challenger Alicante MD | 2018/04/02 12:35 | Koolhof/Sitak v Cervantes/Marrero | 6-4,6-1 |
| Challenger Irving MD | 2018/03/16 23:10 | Petzschner/Peya v Koolhof/Sitak | 6-4,7-5 |
| ATP Estoril MD | 2018/05/01 18:20 | Erlich/Lipsky v Elias/Sousa | 6-2,2-6,9-11 |
| Challenger Tunis MD | 2018/04/18 15:50 | Elias/Sousa v Novak/Weissborn | 3-6,2-6 |
| Davis Cup | 2018/04/07 11:00 | Eriksson/Lindstedt v Elias/Sousa | 7-6,6-2 |
| Davis Cup | 2017/09/16 13:30 | Elias/Sousa v Puetz/Struff | 2-6,6-4,7-6,4-6,4-6 |
| Challenger Lisbon MD | 2017/06/12 16:30 | Roelofse/Rungkat v Elias/Sousa | 6-4,2-6,10-7 |
| ATP Sao Paulo MD | 2017/02/28 17:15 | Monroe/Sitak v Elias/Sousa | 7-6,7-6 |
| ATP Buenos Aires MD | 2017/02/15 23:25 | Cabal/Farah v Elias/Sousa | 6-1,6-1 |
| Davis Cup | 2017/02/04 15:00 | Elias/Sousa v Erlich/Sela | 7-5,6-7,4-6,6-2,5-4 |