Stadium: Court 2 Round: 25 Ground: Clay
| Challenger Rio De Janeiro | 2017/11/21 18:00 | Guilherme Clezar v Goncalo Oliveira | 3-6,6-3,6-3 |
| Challenger Shymkent | 2018/06/05 07:55 | Kevin Krawietz v Goncalo Oliveira | 6-1,6-1 |
| Challenger Vicenza | 2018/05/29 09:00 | Daniel Gimeno-Traver v Goncalo Oliveira | 6-3,6-4 |
| French Open Qual | 2018/05/25 08:00 | Bernard Tomic v Goncalo Oliveira | 7-6,7-5 |
| French Open Qual | 2018/05/23 11:05 | Goncalo Oliveira v Jan Choinski | 6-4,1-6,6-1 |
| French Open Qual | 2018/05/21 12:50 | Goncalo Oliveira v Jason Kubler | 6-2,7-5 |
| Challenger Lisbon | 2018/05/15 10:00 | Goncalo Oliveira v Felix Auger Aliassime | 3-6,5-7 |
| Challenger Braga | 2018/05/09 13:00 | Felix Auger Aliassime v Goncalo Oliveira | 6-3,6-1 |
| Challenger Braga | 2018/05/08 09:00 | Goncalo Oliveira v David Vega Hernandez | 7-6,4-6,6-2 |
| Challenger Shymkent | 2018/06/05 04:00 | Tung-Lin Wu v Guilherme Clezar | 7-5,6-4 |
| Challenger Vicenza | 2018/06/01 14:30 | Guilherme Clezar v Gian Marco Moroni | 3-6,2-6 |
| Challenger Vicenza | 2018/05/31 12:30 | Guilherme Clezar v Gianluigi Quinzi | 6-4,6-3 |
| Challenger Vicenza | 2018/05/30 09:00 | Lorenzo Sonego v Guilherme Clezar | 6-3,3-6,4-6 |
| Challenger Vicenza Qual | 2018/05/28 10:00 | Gianluca Mager v Guilherme Clezar | 6-3,6-2 |
| Challenger Vicenza Qual | 2018/05/27 09:00 | Luca Giacomini v Guilherme Clezar | 5-7,3-6 |
| Challenger Vicenza Qual | 2018/05/26 08:00 | Fabien Reboul v Guilherme Clezar | 2-6,4-6 |
| French Open Qual | 2018/05/21 09:15 | Denis Kudla v Guilherme Clezar | 6-3,6-7,7-5 |