Stadium: Centrale Round: 26 Ground: Clay
| Challenger San Benedetto | 2018/07/17 19:00 | Quinzi, Gianluigi v Andrea Vavassori | 6-0,6-0 |
| Challenger Perugia | 2018/07/15 19:30 | Quinzi, Gianluigi v Ulises Blanch | 5-7,2-6 |
| Challenger Perugia | 2018/07/14 17:10 | Salvatore Caruso v Quinzi, Gianluigi | 2-6,0-6 |
| Challenger Perugia | 2018/07/13 17:00 | Gimeno-Traver, Daniel v Quinzi, Gianluigi | 1-6,2-6 |
| Challenger Perugia | 2018/07/12 11:00 | Quinzi, Gianluigi v Donati, Matteo | 6-4,6-4 |
| Challenger Perugia | 2018/07/11 13:00 | Ojeda Lara, Ricardo v Quinzi, Gianluigi | 4-6,5-7 |
| Milan, Italy | 2018/06/28 15:30 | Arnaboldi, Andrea v Quinzi, Gianluigi | 7-5,2-6,6-3 |
| Milan, Italy | 2018/06/26 13:40 | Hernan Casanova v Quinzi, Gianluigi | 4-6,4-6 |
| Challenger San Benedetto | 2018/07/17 17:50 | Guttierrez-Ferrol, Sergio v Federico Gaio | 6-3,3-6,6-3 |
| ITF Spain F17 | 2018/07/06 15:00 | Guttierrez-Ferrol, Sergio v Hugo Grenier | 3-6,3-6 |
| ITF Spain F17 | 2018/07/06 09:00 | Guttierrez-Ferrol, Sergio v Altug Celikbilek | 3-6,7-6,6-3 |
| ITF Spain F17 | 2018/07/05 09:10 | Guttierrez-Ferrol, Sergio v Cayre, Paul | 6-2,6-7,6-1 |
| ITF Spain F17 | 2018/07/04 14:30 | Guttierrez-Ferrol, Sergio v Cayre, Paul | 6-2,6-7,5-1 |
| ITF Spain F17 | 2018/07/03 13:50 | Guttierrez-Ferrol, Sergio v Arthur Rinderknech | 4-6,6-2,6-3 |
| Wimbledon Qual | 2018/06/25 13:40 | Guttierrez-Ferrol, Sergio v Glasspool, Lloyd | 5-7,5-7 |
| Challenger Poprad Tatry | 2018/06/21 11:40 | de Greef, Arthur v Guttierrez-Ferrol, Sergio | 6-2,7-5 |