Stadium: Central Round: 45 Ground: Hardcourt indoor
| Challenger Ismaning | 2018/10/16 15:20 | Grigelis, Laurynas v Krawietz, Kevin | 4-6,6-7 |
| Challenger - Barcelone | 2018/10/09 11:00 | Guttierrez-Ferrol, Sergio v Grigelis, Laurynas | 6-4,6-2 |
| Florence, Italy | 2018/10/02 14:05 | Krawietz, Kevin v Grigelis, Laurynas | 6-4,3-6,6-3 |
| Challenger Biella | 2018/09/18 09:45 | Grigelis, Laurynas v Robredo, Tommy | 4-6,6-7 |
| Challenger Banja Luka | 2018/09/14 10:30 | Grigelis, Laurynas v Alessandro Giannessi | 3-6,4-6 |
| Challenger Banja Luka | 2018/09/13 13:30 | Grigelis, Laurynas v Bellucci, Thomaz | 2-6,7-6,6-3 |
| Challenger Banja Luka | 2018/09/11 12:30 | Marco Trungelliti v Grigelis, Laurynas | 3-6,3-6 |
| Challenger Seville | 2018/09/06 21:00 | Krstin, Pedja v Grigelis, Laurynas | 2-6,6-3,6-4 |
| Mouilleron-Le-Captif, France, Qualifying | 2017/11/04 14:10 | Evan Furness v Bertrand, Ulysse | 6-0,6-2 |
| Mouilleron-Le-Captif, France, Qualifying | 2016/11/05 09:40 | Bertrand, Ulysse v Stuart Parker | 4-6,3-6 |