Stadium: Court 4 Round: 25 Ground: Clay
| Challenger Szczecin | 2018/09/12 11:00 | Guttierrez-Ferrol, Sergio v Alejandro Davidovich Fokina | 5-7,6-7 |
| Challenger Szczecin | 2018/09/10 11:15 | Lorenzi, Paolo v Guttierrez-Ferrol, Sergio | 4-6,6-3,5-7 |
| Challenger Seville | 2018/09/06 15:30 | Brkic, Tomislav v Guttierrez-Ferrol, Sergio | 6-3,6-7,6-2 |
| Challenger Seville | 2018/09/05 09:00 | Lorenzo Giustino v Guttierrez-Ferrol, Sergio | 7-5,3-6,3-6 |
| Challenger Seville | 2018/09/03 17:00 | Guttierrez-Ferrol, Sergio v Martin, Andrej | 6-3,6-0 |
| Challenger Mallorca | 2018/08/28 09:30 | Simon, Tobias v Guttierrez-Ferrol, Sergio | 6-3,6-2 |
| US Open, New York, USA | 2018/08/21 22:15 | Polansky, Peter v Guttierrez-Ferrol, Sergio | 6-4,6-4 |
| Challenger Meerbusch | 2018/08/14 11:40 | Guttierrez-Ferrol, Sergio v Zizou Bergs | 6-1,3-6,3-6 |
| ITF Italy F29 | 2018/09/29 12:00 | Giovanni Fonio v Ehrat, Sandro | 5-7,4-6 |
| ITF Italy F29 | 2018/09/28 12:00 | Galoppini, Davide v Giovanni Fonio | 5-7,3-6 |
| ITF Italy F29 | 2018/09/27 12:00 | Torebko, Peter v Giovanni Fonio | 3-6,6-7 |
| ITF Italy F29 | 2018/09/26 15:10 | Forti, Francesco v Giovanni Fonio | 2-6,4-6 |
| ITF Italy F29 | 2018/09/24 13:30 | Giovanni Fonio v Bensoussan, Samuel | 7-6,6-4 |
| Challenger Biella | 2018/09/17 10:00 | Tomas Barrios Vera v Giovanni Fonio | 0-6,6-2,6-4 |
| Challenger Biella | 2018/09/16 13:25 | Giovanni Fonio v Basso, Andrea | 6-3,7-6 |
| Challenger Biella | 2018/09/15 11:50 | Giovanni Fonio v Ceretti, Edoardo | 6-0,6-0 |