13‑Nov‑2023 | M15 Boca Raton FL | Clay | R32 | | 1545 | (Q)Alvin Nicholas Tudorica [CAN] d. (Q)Schlagenhauf | 6-3 6-3 | | | | | | | | | |
14‑Aug‑2023 | M25 Ystad | Clay | R32 | 1653 | 399 | (4)Karl Friberg [SWE] d. (Q)Schlagenhauf | 6-2 6-0 | | | | | | | | | |
12‑Jun‑2023 | M15 Duffel | Clay | R32 | 1582 | 584 | (5)Tibo Colson [BEL] d. (Q)Schlagenhauf | 7-5 6-0 | | | | | | | | | |
5‑Jun‑2023 | M15 Sarajevo | Clay | R32 | 1575 | 543 | (5)Matias Zukas [ARG] d. (Q)Schlagenhauf | 6-1 7-5 | | | | | | | | | |
29‑May‑2023 | M25 Jablonec nad Nisou | Clay | R32 | 1575 | 661 | (SE)Tim Handel [GER] d. (Q)Schlagenhauf | 6-2 7-6(3) | | | | | | | | | |
22‑May‑2023 | M15 Warmbad Villach | Clay | R32 | 1564 | 682 | Lorenzo Bocchi [ITA] d. (Q)Schlagenhauf | 6-1 6-4 | | | | | | | | | |