| Challenger Phan Thiet | 01/30 05:00 | 26 | Petr Bar Biryukov vs Ilia Simakin | View |
| Challenger Phan Thiet | 01/27 04:55 | 25 | [275] Ilia Simakin v Federico Cina [237] | 6-3,3-6,6-3 | |
| Challenger Phan Thiet | 01/25 06:00 | 29 | [275] Ilia Simakin v Soonwoo Kwon [486] | 2-6,6-7 | |
| Challenger Phan Thiet | 01/24 03:30 | 28 |
[275] Ilia Simakin v
Daniel Michalski
[257]
|
6-7,6-1,6-3 | |
| Challenger Phan Thiet | 01/23 05:45 | 27 | [275] Ilia Simakin v Robin Bertrand [307] | 7-6,5-7,6-4 | |
| Challenger Phan Thiet | 01/22 03:00 | 26 |
[334] Omar Jasika
v
Ilia Simakin [275] |
3-6,0-6 | |
| Challenger Phan Thiet | 01/20 05:45 | 25 |
[264] Pol Martin Tiffon
v
Ilia Simakin [275] |
6-2,3-6,5-7 | |
| M25 Chennai | 01/17 06:00 | - | [240] Niels Visker v Ilia Simakin [272] | 7-6,6-4 | |
| M25 Chennai | 01/16 06:00 | - | Dominik Palan v Ilia Simakin | 4-6,6-4,4-6 | |
| M25 Chennai | 01/15 06:00 | - | Mitsuki Wei Kang Leong v Ilia Simakin | 4-6,3-6 | |
| M25 Chennai | 01/14 06:00 | - | Madhwin Kamath v Ilia Simakin | 1-6,1-6 | |
| Challenger Manama | 11/30 12:00 | 29 | [329] Toby Samuel v Ilia Simakin [281] | 6-0,6-2 | |
| Challenger Manama | 11/29 10:00 | 28 | [330] Petr Brunclik v Ilia Simakin [281] | 6-1,6-7,3-6 |
Ilia Simakin (born 27 October 2003) is a Russian professional tennis player. He has a career-high ATP singles ranking of No. 228 achieved on 9 June 2025 and a best doubles ranking of No. 230 achieved on 19 May 2025.