13‑Nov‑2023 | M15 East Lansing MI | | R32 | 1356 | 1404 | Braden Shick [USA] d. Krstin | 6-1 1-0 RET | | | | | | | | | |
15‑May‑2023 | M15 Prijedor | Clay | R32 | 866 | 893 | Dusan Obradovic [SRB] d. Krstin | 6-2 6-1 | | | | | | | | | |
6‑Mar‑2023 | M15 Sharm ElSheikh | Hard | R16 | 618 | 521 | (5)Leo Borg [SWE] d. Krstin | 3-6 7-5 6-2 | | | | | | | | | |
6‑Mar‑2023 | M15 Sharm ElSheikh | Hard | R32 | 618 | 940 | Krstin d. (Q)Aliaksandr Bulitski [BLR] | 6-3 6-7(5) 6-4 | | | | | | | | | |
27‑Feb‑2023 | M15 Sharm ElSheikh | Hard | R32 | 620 | 818 | (Q)Johannes Ingildsen [DEN] d. Krstin | 7-6(3) 3-2 RET | | | | | | | | | |
20‑Feb‑2023 | M15 Sharm ElSheikh | Hard | R16 | 619 | 1299 | (LL)Roland Stuurman [NED] d. (7)Krstin | 6-7(3) 6-4 6-2 | | | | | | | | | |
20‑Feb‑2023 | M15 Sharm ElSheikh | Hard | R32 | 619 | 672 | (7)Krstin d. Simone Roncalli [ITA] | 7-5 6-4 | | | | | | | | | |
13‑Feb‑2023 | M15 Sharm ElSheikh | Hard | R32 | 619 | 730 | S D Prajwal Dev [IND] d. (2)Krstin | 6-4 6-1 | | | | | | | | | |