| Challenger - Zhangjiagang | 08/29 06:50 | 25 | Hanyi Liu v Robert Strombachs | 4-6,6-3,3-6 | |
| Challenger - Zhuhai | 08/24 03:00 | 27 | [403] Robert Strombachs v Jason Jung [256] | 4-6,2-6 | |
| Challenger - Zhuhai | 08/23 03:00 | 26 | [313] Dominik Palan v Robert Strombachs [403] | 4-6,7-6,4-6 | |
| Challenger - Zhuhai | 08/21 04:40 | 25 | Robert Strombachs v Tao Mu | 6-4,3-6,6-4 | |
| Challenger - Porto | 08/01 17:30 | 25 | [380] Henrique Rocha v Robert Strombachs [395] | 6-4,4-6,6-4 | |
| Challenger - Porto | 07/31 12:05 | 19 | [395] Robert Strombachs v Duarte Vale [416] | 6-2,7-6 | |
| Challenger - Porto | 07/30 14:00 | 14 | Robert Strombachs v Andrea Guerrieri | 6-3,6-4 | |
| Challenger - Segovia | 07/24 10:50 | 19 | [393] Robert Strombachs v Luca Potenza [462] | 7-6,3-6,6-7 | |
| Challenger - Segovia | 07/23 13:10 | 14 | Robert Strombachs v Maxime Mora | 6-4,6-3 | |
| Challenger - Pozoblanco | 07/16 17:00 | 14 | [397] Robert Strombachs v Alberto Barroso Campos [299] | 2-6,3-6 | |
| ITF - M25 Kassel | 07/12 09:55 | 25 | Milan Welte v Robert Strombachs | 6-3,6-2 | |
| Challenger - Miláno | 07/02 12:05 | 14 | Lucio Carnevalle v Robert Strombachs | 7-5,7-6 | |
| Challenger - Poznan | 06/18 08:30 | 14 | Robert Strombachs v Sebastian Gima | 3-6,5-7 | |
| Challenger - Perugia | 06/11 12:45 | 45 | [261] Renzo Olivo v Robert Strombachs [411] | 6-4,6-1 | |
| ITF - M25 Cordoba | 06/09 08:00 | 26 | [411] Robert Strombachs v Georgii Kravchenko [366] | 5-7,0-6 | |
| ITF - M25 Cordoba | 06/06 08:00 | 25 | Robert Strombachs v Amr Elsayed | Retired | |
| Challenger Troisdorf | 06/02 16:10 | 27 | [121] Pavel Kotov v Robert Strombachs [411] | 2-6,6-3,6-4 | |
| Challenger Troisdorf | 06/01 10:30 | 26 | [263] Hernan Casanova v Robert Strombachs [411] | 4-6,0-6 | |
| Challenger Troisdorf | 05/30 08:00 | 25 | [411] Robert Strombachs v Jozef Kovalik [143] | 7-5,7-6 | |
| Challenger Troisdorf | 05/29 08:30 | 19 | [254] Sumit Nagal v Robert Strombachs [411] | 1-6,6-7 | |
| Challenger Troisdorf | 05/28 08:30 | 14 | [411] Robert Strombachs v Maxime Janvier [343] | 6-3,6-4 | |
| ITF - M25 Most | 05/25 13:25 | 26 | Robert Strombachs v Emilien Voisin | 6-7,6-7 | |
| ITF - M25 Most | 05/23 09:55 | 25 | Robert Strombachs v Hazem Naw | 6-3,4-6,6-4 | |
| ITF - M25 Nottingham | 05/04 09:00 | 26 | Yusuke Takahashi v Robert Strombachs | 6-2,6-1 | |
| ITF - M25 Nottingham | 05/03 12:40 | 25 | Freddy Blaydes v Robert Strombachs | 1-6,2-6 | |
| ITF - M25 Sanxenxo | 04/30 09:00 | 29 | Robert Strombachs v Rigele Te | 6-7,6-3,6-7 | |
| ITF - M25 Sanxenxo | 04/29 13:45 | 28 | Diego F Flores v Robert Strombachs | 6-7,5-7 | |
| ITF - M25 Sanxenxo | 04/28 13:00 | 27 | [450] Robert Strombachs v Johannes Haerteis [386] | 7-6,6-4 | |
| ITF - M25 Sanxenxo | 04/27 16:10 | 26 | Robert Strombachs v Julio Cesar Porras | 6-2,6-2 | |
| ITF - M25 Sanxenxo | 04/26 16:00 | 25 | Robert Strombachs v Ander Tarrio Ponte | 6-1,6-1 |
Robert Strombachs (Latvian: Roberts Štrombahs; born 15 September 1999) is a Latvian-German tennis player.
Strombachs has a career high ATP singles ranking of world No. 338, achieved on 27 November 2023. He also has a career high ATP doubles ranking of No. 383, achieved on 19 August 2019.
Strombachs represents Latvia at the Davis Cup, where he has a W/L record of 7–6.