Stadium: Pallazzetto Alzano Round: 27 Ground: Hardcourt indoor
| Challenger Bergamo MD | 2019/02/20 14:30 | Pel D / Sancic A v Grigelis L / Kolar Z | 3-6,6-3,4-10 |
| Challenger Andria MD | 2017/11/23 14:00 | Arends S / Gille S v Grigelis L / Kolar Z | 6-4,6-4 |
| Challenger Liberec MD | 2017/08/05 13:45 | Grigelis L / Kolar Z v Bednarek T / Pel D | 6-3,6-4 |
| Challenger Liberec MD | 2017/08/04 15:00 | Clezar G / Ficovich J v Grigelis L / Kolar Z | 4-6,7-6,10-12 |
| Challenger Liberec MD | 2017/07/31 09:00 | Grigelis L / Kolar Z v Jaloviec M / Safranek V | 6-3,6-2 |
| Challenger Milan MD | 2017/06/30 08:30 | Bednarek T / Pel D v Grigelis L / Kolar Z | 6-2,7-5 |
| Challenger Milan MD | 2017/06/26 16:25 | Grigelis L / Kolar Z v de Waard S / Mclachlan B | 6-3,6-3 |
| Challenger Samarkand MD | 2017/05/19 09:15 | Gunneswaran P / Vardhan V v Grigelis L / Kolar Z | 6-7,3-6 |