Stadium: Pista 3 Round: 25 Ground: Clay
| Challenger Cassis | 2018/09/03 09:00 | David Guez v Antoine Escoffier | 7-5,2-6,3-6 |
| Challenger Segovia | 2018/07/31 11:35 | Gian Marco Moroni v David Guez | 6-3,6-2 |
| Challenger Astana | 2018/07/16 08:50 | David Guez v Egor Gerasimov | 6-7,3-6 |
| Challenger Recanati | 2018/07/04 19:15 | Viktor Galovic v David Guez | 6-3,6-4 |
| Challenger Recanati | 2018/07/02 14:15 | Roberto Cid Subervi v David Guez | 6-4,6-7,2-6 |
| ATP Antalya Qual | 2018/06/23 12:20 | David Guez v Laurynas Grigelis | 2-6,6-3,5-7 |
| Challenger Fergana | 2018/06/19 05:00 | David Guez v Enrique Lopez-Perez | 0-6,6-2,2-6 |
| ATP Stuttgart Qual | 2018/06/09 11:00 | Mikhail Youzhny v David Guez | 6-2,6-3 |
| Challenger Sibiu | 2018/09/18 12:10 | Matteo Viola v Nino Serdarusic | 2-6,7-6,1-6 |
| Challenger Istanbul | 2018/09/14 13:25 | Thomas Fabbiano v Matteo Viola | 3-6,6-2,6-4 |
| Challenger Istanbul | 2018/09/13 08:00 | Matteo Viola v Constant Lestienne | 6-3,6-1 |
| Challenger Istanbul | 2018/09/10 09:30 | Denis Yevseyev v Matteo Viola | 6-7,4-6 |
| Challenger Cassis | 2018/09/03 09:00 | Matteo Viola v Tak Khunn Wang | 6-0,5-7,5-7 |
| Challenger Como | 2018/08/25 10:45 | Miljan Zekic v Matteo Viola | 6-2,6-4 |
| Challenger Cordenons | 2018/08/14 10:00 | Matteo Viola v Facundo Bagnis | 0-6,2-6 |
| Challenger Segovia | 2018/08/02 10:20 | Matteo Viola v Roberto Quiroz | 5-7,5-7 |