| Challenger de 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 de Milán | 07/02 12:05 | 14 | Lucio Carnevalle v Robert Strombachs | 7-5,7-6 | |
| Challenger de Poznan | 06/18 08:30 | 14 | Robert Strombachs v Sebastian Gima | 3-6,5-7 | |
| Challenger de Perugia | 06/11 12:45 | 45 | [261] Renzo Olivo v Robert Strombachs [411] | 6-4,6-1 | |
| ITF M25 Córdoba | 06/09 08:00 | 26 | [411] Robert Strombachs v Georgii Kravchenko [366] | 5-7,0-6 | |
| ITF M25 Córdoba | 06/06 08:00 | 25 | Robert Strombachs v Amr Elsayed | Retired | |
| Challenger de Troisdorf | 06/02 16:10 | 27 | [121] Pavel Kotov v Robert Strombachs [411] | 2-6,6-3,6-4 | |
| Challenger de Troisdorf | 06/01 10:30 | 26 | [263] Hernan Casanova v Robert Strombachs [411] | 4-6,0-6 | |
| Challenger de Troisdorf | 05/30 08:00 | 25 | [411] Robert Strombachs v Jozef Kovalik [143] | 7-5,7-6 | |
| Challenger de Troisdorf | 05/29 08:30 | 19 | [254] Sumit Nagal v Robert Strombachs [411] | 1-6,6-7 | |
| Challenger de 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 | |
| Challenger de Morelos | 04/17 18:55 | 19 | [487] Luke Saville v Robert Strombachs [451] | 6-1,7-6 | |
| Challenger de Morelos | 04/16 22:00 | 14 | [216] Michail Pervolarakis v Robert Strombachs [450] | Retired | |
| Challenger de León | 04/09 18:50 | 14 | [447] Robert Strombachs v Aidan Mchugh [410] | 2-6,6-1,6-7 | |
| Challenger de San Luis Potosí | 04/02 19:35 | 14 | [465] Jorge Panta v Robert Strombachs [452] | 6-4,6-3 | |
| ITF M15 Sharm El Sheikh | 03/18 08:00 | 28 | [399] Lukas Pokorny v Robert Strombachs [480] | 6-3,3-6,6-3 | |
| ITF M15 Sharm El Sheikh | 03/17 08:00 | 27 | Robert Strombachs v Jakob Schnaitter | 6-2,6-1 | |
| ITF M15 Sharm El Sheikh | 03/16 08:00 | 26 | Robert Strombachs v Zach Stephens | 6-1,7-5 | |
| ITF M15 Sharm El Sheikh | 03/15 13:20 | 25 | [480] Robert Strombachs v Johannes Ingildsen [366] | 7-5,6-3 | |
| ITF M15 Sharm El Sheikh | 03/12 08:00 | 29 | Robert Strombachs v Mohamed Safwat | 6-2,6-3 |
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.