Stadium: Court 1 Round: 54 Ground: Hardcourt indoor
| Coupe Davis | 2021/09/17 13:00 | Henri Laaksonen v Siimar, Mattias | 6-4,6-0 |
| ITF M15 Parnu | 2021/08/08 08:00 | Ergi Kirkin v Siimar, Mattias | 5-7,6-3,6-3 |
| ITF M15 Parnu | 2021/08/07 09:00 | Siimar, Mattias v Ivanov, Vladimir | 6-4,3-6,6-2 |
| ITF M15 Parnu | 2021/08/05 09:45 | Siimar, Mattias v Benjamin Lock | 6-3,6-4 |
| ITF M15 Parnu | 2021/08/04 10:15 | Siimar, Mattias v Vilius Gaubas | 4-6,6-1,7-5 |
| ITF M15 Parnu | 2020/11/06 08:00 | Simon Freund v Siimar, Mattias | 1-6,6-3,1-6 |
| ITF M15 Parnu | 2020/11/05 11:10 | Siimar, Mattias v Kristjan Tamm | 6-3,6-7,6-3 |
| ITF M15 Parnu | 2020/11/04 08:00 | Siimar, Mattias v Hietaranta, Roni Mikael | 6-3,6-2 |
| ITF M15 Cairo | 2021/07/25 07:00 | Nicolas Bruna v Arcila, Sebastian | 6-4,6-2 |
| ITF M15 Cairo | 2021/07/18 07:30 | Gagliardo, Lorenzo v Arcila, Sebastian | 2-6,6-2,10-8 |
| Coupe Davis | 2021/07/02 14:00 | Rowland Phillips v Arcila, Sebastian | 6-3,6-0 |
| Coupe Davis | 2021/07/01 14:00 | Arcila, Sebastian v Armstrong, Russell | 6-1,6-1 |
| ITF M15 Tallahassee | 2019/12/03 15:00 | Martins Rocens v Arcila, Sebastian | 6-4,1-6,10-6 |
| ITF M15 Tallahassee | 2019/12/02 15:00 | Arcila, Sebastian v Sinn, Maximilian | 6-2,6-1 |
| ITF USA F35 | 2018/12/04 16:00 | Arcila, Sebastian v Thongoana, Richard | 3-6,3-6 |
| Coupe Davis | 2018/02/04 18:45 | Manuel Sanchez v Arcila, Sebastian | 7-5,6-0 |