| Litauen - Int. - Kval | 2019/06/06 10:40 | Jonas Schwarz v Markus Barth | W | 1-2 |
| Latvia Int. Qual | 2019/05/31 07:30 | Markus Barth v Axel Henrik Parkhøi | L | 1-2 |
| Latvia Int. Qual | 2019/05/30 14:00 | Markus Barth v Jack Joseph O'Brien | W | 2-0 |
| Swiss Open - Damdubbel - Kval | 2019/02/27 08:20 | Andrija Doder v Markus Barth | W | 0-2 |