Stadium: Quadra Guga Kuerten Round: 26
| Challenger Rio De Janeiro | 2017/11/24 19:00 | Carlos Berlocq v Guilherme Clezar | 7-5,6-1 |
| Challenger Rio De Janeiro | 2017/11/23 14:00 | Christian Lindell v Guilherme Clezar | 3-6,0-6 |
| Challenger Rio De Janeiro | 2017/11/21 18:00 | Guilherme Clezar v Goncalo Oliveira | 3-6,6-3,6-3 |
| Challenger Santiago 2 | 2017/11/14 22:00 | Guilherme Clezar v Gonzalo Lama | 4-6,6-2,3-6 |
| Challenger Montevideo | 2017/11/08 17:00 | Nicolas Kicker v Guilherme Clezar | 6-3,6-1 |
| Challenger Montevideo | 2017/11/06 21:55 | Attila Balazs v Guilherme Clezar | 6-7,6-7 |
| Challenger Lima | 2017/10/24 15:30 | Blaz Rola v Guilherme Clezar | 7-6,6-0 |
| Challenger Cali 2 | 2017/10/21 16:00 | Guilherme Clezar v Federico Delbonis | 6-7,5-7 |
| Challenger Bratislava | 2017/11/06 19:20 | Mikhail Kukushkin v Alessandro Giannessi | 6-0,6-2 |
| Challenger Brest | 2017/10/26 11:40 | Alessandro Giannessi v Jeremy Chardy | 1-6,1-6 |
| Challenger Brest | 2017/10/25 10:35 | Alexey Vatutin v Alessandro Giannessi | 6-4,2-6,1-6 |
| ATP Stockholm | 2017/10/17 10:00 | Jeremy Chardy v Alessandro Giannessi | 6-0,7-5 |
| ATP Beijing Qual | 2017/09/30 07:00 | Alessandro Giannessi v Dusan Lajovic | 3-6,6-3,3-6 |
| ATP Shenzhen | 2017/09/25 06:00 | Alessandro Giannessi v Jeremy Chardy | 6-7,4-6 |
| ATP Metz | 2017/09/18 13:55 | Alessandro Giannessi v Marius Copil | 3-6,2-6 |
| Challenger Szczecin | 2017/09/12 10:30 | Artem Smirnov v Alessandro Giannessi | 7-6,6-1 |