Stadium: Center Round: 46
| Challenger Lille Qual | 2018/03/17 10:45 | Guez, David v Gueydan, Quentin | 6-1,6-4 |
| France F4, Singles | 2018/03/10 15:50 | Botic Van De Zandschulp v Guez, David | 2-6,7-6,6-3 |
| France F4, Singles | 2018/03/09 14:25 | Rochette, Laurent v Guez, David | 3-6,3-6 |
| France F4, Singles | 2018/03/08 11:00 | Enzo Couacaud v Guez, David | 4-6,2-6 |
| France F4, Singles | 2018/03/07 11:00 | Petit, Gabriel v Guez, David | 5-7,1-6 |
| ITF Portugal F2 | 2018/03/05 22:15 | Evan Furness v Guez, David | 6-1,6-1 |
| ITF Portugal F2 | 2018/03/05 14:20 | Guez, David v Manuel Guinard | 5-7,6-4,6-4 |
| ITF Portugal F2 | 2018/03/04 11:35 | Bothwell, Peter v Guez, David | 1-6,2-6 |
| Challenger Lille Qual | 2018/03/17 09:00 | Cacic, Nikola v Arends, Sander | 6-3,3-6,6-1 |
| ITF Turkey F9 | 2018/03/08 12:40 | Nedelko, Ivan v Cacic, Nikola | 6-0,6-4 |
| ITF Turkey F9 | 2018/03/06 09:25 | Cacic, Nikola v Busch, Ruben | 6-1,6-1 |
| Turkey F8, Singles Qualifying | 2018/03/02 07:00 | Cacic, Nikola v Oriol Roca Batalla | 7-6,2-6,4-6 |
| Turkey F8, Singles Qualifying | 2018/03/01 11:55 | Cacic, Nikola v Camilo Ugo Carabelli | 6-3,6-2 |
| Turkey F8, Singles Qualifying | 2018/03/01 07:00 | Cacic, Nikola v Felipe Meligeni Rodrigues Alves | 6-3,7-6 |
| Challenger Chennai Qual | 2018/02/10 09:30 | Cacic, Nikola v R Prabodh, Suraj | 6-3,7-5 |
| Challenger Budapest Qual | 2018/02/05 11:55 | Krawietz, Kevin v Cacic, Nikola | 6-2,6-7,7-6 |