| ITF - Roménia F12 | 08/31 12:00 | 26 | Laurynas Grigelis v Alexandru Vasile Manole | 6-2,2-6,6-3 | |
| ITF - Roménia F12 | 08/30 10:00 | 25 | Laurynas Grigelis v Alexander Merino | 6-3,6-2 | |
| Open dos EUA - Qualificação | 08/23 17:40 | 44 | [120] Lukas Lacko v Laurynas Grigelis [237] | 6-3,6-4 | |
| Challenger - Liberec | 08/04 12:00 | 27 | [204] Vaclav Safranek v Laurynas Grigelis [227] | 6-7,6-1,6-3 | |
| Challenger - Liberec | 08/03 14:40 | 26 | [227] Laurynas Grigelis v Cedrik-Marcel Stebe [128] | 6-4,3-6,6-3 | |
| Challenger - Liberec | 08/01 14:40 | 25 | [227] Laurynas Grigelis v Riccardo Bellotti [236] | 7-6,7-6 | |
| ITF - Lituânia F1 | 07/19 13:25 | 26 | Laurynas Grigelis v Patrik Brydolf | 3-6,6-7 | |
| ITF - Lituânia F1 | 07/18 12:45 | 25 | Laurynas Grigelis v Keisuke Numajiri | 6-1,6-3 | |
| ITF - Polónia F5 | 07/16 09:00 | 29 | [251] Laurynas Grigelis v Zdenek Kolar [254] | Retired | |
| ITF - Polónia F5 | 07/15 10:55 | 28 | Laurynas Grigelis v Antonio Massara | 6-1,6-2 | |
| ITF - Polónia F5 | 07/14 12:20 | 27 | Laurynas Grigelis v Pawel Cias | 6-7,6-3,6-2 | |
| ITF - Polónia F5 | 07/13 15:15 | 26 | Laurynas Grigelis v Thibault Cancel | 6-2,6-3 | |
| ITF - Polónia F5 | 07/12 11:45 | 25 | [251] Laurynas Grigelis v Agustin Velotti [249] | 7-6,6-3 | |
| ITF - Polónia F4 | 07/09 11:30 | 29 | Laurynas Grigelis v Alexei Popyrin | 3-6,6-3,3-6 | |
| ITF - Polónia F4 | 07/08 11:35 | 28 | Laurynas Grigelis v Billy Harris | 6-2,6-4 | |
| ITF - Polónia F4 | 07/07 11:05 | 27 | Laurynas Grigelis v Samuel Bensoussan | 6-2,6-1 | |
| ITF - Polónia F4 | 07/06 11:00 | 26 | Laurynas Grigelis v Ewan Moore | 6-3,6-2 | |
| ITF - Polónia F4 | 07/04 10:30 | 25 | Laurynas Grigelis v Karol Drzewiecki | 6-2,6-1 | |
| Challenger - Milão | 06/27 11:10 | 25 | [105] Marco Cecchinato v Laurynas Grigelis [249] | 5-7,7-5,7-6 | |
| Challenger - Todi | 06/22 14:55 | 26 | Laurynas Grigelis v Liam Caruana | 5-7,3-6 | |
| Challenger - Todi | 06/20 16:15 | 25 | [99] Alessandro Giannessi v Laurynas Grigelis [251] | Retired | |
| Challenger Lyon | 06/14 16:00 | 26 | Laurynas Grigelis v Felix A-Aliassime | 7-6,1-6,4-6 | |
| Challenger Lyon | 06/12 10:50 | 25 | Duckhee Lee v Laurynas Grigelis | 4-6,5-7 | |
| Challenger - Shymkent | 05/23 07:10 | 25 | Evgeny Tyurnev v Laurynas Grigelis | 6-4,6-4 | |
| Challenger - Samarkand | 05/16 08:15 | 25 | [170] Egor Gerasimov v Laurynas Grigelis [245] | 6-4,6-7,6-3 | |
| ATP - Istambul - Qualificação | 04/30 09:00 | - | [249] Laurynas Grigelis v Riccardo Bellotti [204] | 2-6,1-6 | |
| ATP - Istambul - Qualificação | 04/29 08:00 | 26 | [141] Tobias Kamke v Laurynas Grigelis [249] | 7-5,5-7,1-6 | |
| Challenger - Francavilla | 04/24 11:50 | 25 | [219] Pedro Sousa v Laurynas Grigelis [249] | 7-6,6-4 | |
| ITF - Tunísia F15 | 04/20 08:30 | 26 | Laurynas Grigelis v Kirill Dmitriev | 3-6,6-4,2-6 | |
| ITF - Tunísia F15 | 04/19 13:15 | 25 | Laurynas Grigelis v Francesco Vilardo | 6-3,6-2 |