Stadium: C Round: 28 Ground: Clay
| Challenger Mestre | 2018/05/25 13:50 | Lorenzo Giustino v Quinzi, Gianluigi | 6-2,6-7,3-6 |
| Challenger Mestre | 2018/05/23 10:15 | Federico Gaio v Quinzi, Gianluigi | 6-7,3-6 |
| Challenger - Rome | 2018/05/11 11:50 | Quinzi, Gianluigi v Pavlasek, Adam | 7-6,3-6,5-7 |
| Challenger - Rome | 2018/05/10 11:00 | Quinzi, Gianluigi v Dutra Silva, Rogerio | 6-4,6-4 |
| Challenger - Rome | 2018/05/09 10:25 | Bemelmans, Ruben v Quinzi, Gianluigi | 6-4,1-6,2-6 |
| Challenger - Rome | 2018/05/08 12:05 | Quinzi, Gianluigi v Marcora, Roberto | 6-4,6-4 |
| Challenger - Ostrava | 2018/05/04 12:20 | Quinzi, Gianluigi v Gregoire Barrere | 2-6,6-7 |
| Challenger - Ostrava | 2018/05/02 10:30 | Quinzi, Gianluigi v Lorenzo Giustino | 6-3,6-2 |
| Challenger Mestre | 2018/05/25 09:30 | Guttierrez-Ferrol, Sergio v Petrovic, Danilo | 6-1,4-6,1-6 |
| Challenger Mestre | 2018/05/24 09:30 | Griekspoor, Scott v Petrovic, Danilo | 7-6,6-7,1-6 |
| Challenger Mestre | 2018/05/21 12:10 | Basso, Andrea v Petrovic, Danilo | 6-2,1-6,3-6 |
| Puerto Vallarta, Mexico | 2018/05/05 23:00 | Menendez-Maceiras, Adrian v Petrovic, Danilo | 1-6,7-5,6-3 |
| Puerto Vallarta, Mexico | 2018/05/04 23:00 | Petrovic, Danilo v Gomez-Herrera, Carlos | 6-3,6-3 |
| Puerto Vallarta, Mexico | 2018/05/03 21:00 | Petrovic, Danilo v Pavic, Ante | 6-3,6-2 |
| Puerto Vallarta, Mexico | 2018/05/02 19:00 | Petrovic, Danilo v Ugo Humbert | 6-4,3-6,6-3 |
| Puerto Vallarta, Mexico | 2018/05/01 18:35 | Petrovic, Danilo v Escobar, Gonzalo | 6-3,1-6,6-2 |