| Schlieren, Singles M-ITF-SUI-02A | 08/23 13:10 | 27 | Slobodchikov, Ronald v Grigelis, Laurynas | 4-6,6-7 | |
| Schlieren, Singles M-ITF-SUI-02A | 08/22 10:00 | 26 | Baltensperger, Raphael v Grigelis, Laurynas | 6-7,2-6 | |
| Schlieren, Singles M-ITF-SUI-02A | 08/21 12:30 | 25 | Buvaysar Gadamauri v Grigelis, Laurynas | 6-2,0-6,3-6 | |
| Challenger - Prague | 07/22 11:40 | 24 | [296] Grigelis, Laurynas v Pavlasek, Adam [329] | 2-6,0-6 | |
| ATP Bastad | 07/15 09:00 | 164 | [295] Grigelis, Laurynas v Constant Lestienne [198] | 6-1,2-6,1-6 | |
| ATP Bastad | 07/14 08:30 | 64 | [170] Joao Domingues v Grigelis, Laurynas [295] | 6-7,6-2,2-6 | |
| Challenger - Perugia | 07/08 09:00 | 166 | [295] Grigelis, Laurynas v Clezar, Guilherme [322] | 6-4,6-7,1-6 | |
| Ludwigshafen, Allemagne | 07/02 09:00 | 24 | [161] Facundo Bagnis v Grigelis, Laurynas [295] | 6-4,6-1 | |
| Milan, Italy | 06/25 15:20 | 25 | [224] Sumit Nagal v Grigelis, Laurynas [293] | 6-2,6-3 | |
| Milan, Italy | 06/24 09:45 | 24 | [278] Tatlot, Johan Sebastien v Grigelis, Laurynas [293] | Retired | |
| Parma II, Italy | 06/18 09:55 | 25 | [326] Andrea Collarini v Grigelis, Laurynas [295] | 6-3,6-3 | |
| Challenger - Barletta | 04/09 13:30 | 25 | Stefano Napolitano v Grigelis, Laurynas | Walkover | |
| Challenger - Barletta | 04/08 14:00 | 24 | [289] Grigelis, Laurynas v Zdenek Kolar [219] | 1-6,6-3,7-5 | |
| Coupe Davis | 04/06 14:15 | - | Ahouda, Amine v Grigelis, Laurynas | 4-6,2-6 | |
| Coupe Davis | 04/06 14:15 | - | Moundir, Adam v Grigelis, Laurynas | Cancelled | |
| Coupe Davis | 04/05 12:45 | - | [440] Ouahab, Lamine v Grigelis, Laurynas [287] | 6-2,6-0 | |
| Challenger St Brieuc | 03/25 11:20 | 24 | [284] Grigelis, Laurynas v Brkic, Tomislav [299] | 6-7,6-7 | |
| Challenger - Pau | 02/27 14:05 | 25 | [174] Sebastian Ofner v Grigelis, Laurynas [284] | 7-6,6-4 | |
| Challenger - Pau | 02/26 09:00 | 24 | [303] Carlos Taberner v Grigelis, Laurynas [284] | 4-6,6-4,3-6 | |
| Bergamo, Italy | 02/18 15:25 | 24 | [282] Grigelis, Laurynas v Marcora, Roberto [250] | 0-6,3-6 | |
| Bangkok, Thaïlande | 02/12 07:15 | 25 | [223] Sela, Dudi v Grigelis, Laurynas [282] | 6-7,6-0,6-2 | |
| Bangkok, Thaïlande | 02/11 08:15 | 24 | [322] Wu, Di v Grigelis, Laurynas [282] | 7-6,2-6,2-6 | |
| Challenger - Chennai | 02/07 06:35 | 26 | [287] Grigelis, Laurynas v Corentin Moutet [145] | 2-6,3-6 | |
| Challenger - Chennai | 02/06 04:30 | 25 | [287] Grigelis, Laurynas v Nam Hoang Ly [422] | 4-6,6-2,6-1 | |
| Challenger - Koblenz | 01/14 16:35 | 24 | [281] Grigelis, Laurynas v Pavel Kotov [345] | 6-7,3-6 | |
| Challenger Columbus | 01/10 22:25 | 26 | [291] Jan Choinski v Grigelis, Laurynas [283] | 7-6,4-6,6-2 | |
| Challenger Columbus | 01/08 19:05 | 25 | [283] Grigelis, Laurynas v Mathias Bourgue [259] | 3-6,6-3,6-4 | |
| Challenger Columbus | 01/07 18:05 | 24 | [283] Grigelis, Laurynas v Liam Broady [274] | 3-6,6-0,7-5 | |
| Orlando, USA | 12/31 23:30 | 24 | [287] Grigelis, Laurynas v Ulises Blanch [313] | 1-6,2-6 | |
| Challenger Andria | 11/21 12:40 | 26 | [137] Quentin Halys v Grigelis, Laurynas [311] | 6-3,7-6 |