| Challenger Matsuyama | 11/07 01:00 | 19 | [406] Ergi Kirkin v Naoki Nakagawa [443] | 4-6,6-2,6-1 | |
| Challenger Matsuyama | 11/06 01:00 | 14 | Ergi Kirkin v Renta Tokuda | 4-6,6-3,7-5 | |
| Challenger Yokohama | 11/02 01:30 | 26 | [102] Christopher O'Connell v Ergi Kirkin [406] | 6-3,6-4 | |
| Challenger Yokohama | 10/31 04:40 | 25 | Shinji Hazawa v Ergi Kirkin | 4-6,2-6 | |
| Challenger Hamburg | 10/18 18:10 | 25 | [291] Robin Haase v Ergi Kirkin [414] | 6-2,6-4 | |
| Challenger Hamburg | 10/17 11:00 | 19 | Ergi Kirkin v John Sperle | 6-7,6-3,6-2 | |
| Challenger Hamburg | 10/16 13:55 | 14 | [417] Ergi Kirkin v Tim Sandkaulen [326] | 2-6,7-5,6-2 | |
| ITF M25 Rodez | 10/14 15:00 | 27 | [417] Ergi Kirkin v Antoine Hoang [441] | 3-6,4-6 | |
| ITF M25 Rodez | 10/13 11:25 | 26 | Ergi Kirkin v Allan Deschamps | 7-5,6-7,6-4 | |
| ITF M25 Rodez | 10/12 12:30 | 25 | Ergi Kirkin v Matt Ponchet | 6-1,6-0 | |
| Challenger Lisbon | 09/25 09:00 | 14 | [247] Daniel Michalski v Ergi Kirkin [387] | Cancelled | |
| Challenger Tulln | 09/04 08:00 | 14 | [255] Jelle Sels v Ergi Kirkin [334] | 6-3,4-6,6-0 | |
| Challenger Prague | 08/23 14:15 | 25 | [302] Ergi Kirkin v Lukas Rosol [335] | 6-4,4-6,6-7 | |
| Challenger Grodzisk Mazowiecki | 08/16 08:00 | 25 | [303] Ergi Kirkin v Illya Marchenko [322] | 6-7,3-6 | |
| Challenger San Benedetto | 07/24 09:00 | 14 | [302] Ergi Kirkin v Michael Vrbensky [470] | 6-4,4-6,3-6 | |
| ITF M25 Radomlje | 07/20 13:00 | 25 | Ergi Kirkin v Filip Jeff Planinsek | 6-7,4-6 | |
| ITF M25 Telfs | 07/17 10:00 | 29 | [306] Ergi Kirkin v Oliver Crawford [363] | 6-4,7-5 | |
| ITF M25 Telfs | 07/16 11:30 | 28 | [306] Ergi Kirkin v Valentin Royer [464] | Retired | |
| ITF M25 Telfs | 07/15 10:35 | 27 | [306] Ergi Kirkin v Gergely Madarasz [444] | Retired | |
| ITF M25 Telfs | 07/14 11:55 | 26 | Ergi Kirkin v Mick Veldheer | 6-0,6-2 | |
| ITF M25 Telfs | 07/13 14:30 | 25 | Ergi Kirkin v Luca Castagnola | 6-2,6-2 | |
| Challenger Salzburg | 07/04 09:00 | 19 | [308] Ergi Kirkin v Maxmilian Neuchrist [457] | 4-6,4-6 | |
| Challenger Salzburg | 07/03 09:00 | 14 | [308] Ergi Kirkin v Bogdan Bobrov [483] | 6-1,6-1 | |
| Challenger Oeiras | 06/21 10:00 | 25 | [260] Johan Nikles v Ergi Kirkin [305] | 4-6,6-3,6-0 | |
| Challenger Blois | 06/13 11:50 | 19 | [383] Luca Van Assche v Ergi Kirkin [310] | 6-3,6-1 | |
| Challenger Blois | 06/12 14:45 | 14 | Vincent Stouff v Ergi Kirkin | 3-6,3-6 | |
| Challenger Orlando | 06/06 18:45 | 25 | [350] Brandon Holt v Ergi Kirkin [312] | 6-2,6-3 | |
| Challenger Little Rock | 05/30 18:50 | 25 | [157] Christopher Eubanks v Ergi Kirkin [310] | 6-3,6-4 | |
| Challenger Shymkent | 05/16 08:45 | 25 | [351] Nicholas D Ionel v Ergi Kirkin [302] | 6-2,0-6,6-4 | |
| Challenger Shymkent | 05/13 04:30 | 28 | [329] Ergi Kirkin v Sebastian Fanselow [397] | 6-7,4-6 |
Ergi Kırkın (born 27 January 1999) is a Turkish tennis player.
Kırkın has a career high ATP singles ranking of World No. 251 achieved on 6 May 2024. He has won 9 ITF singles titles. He also has a career high ATP doubles ranking of World No. 300 achieved on 26 February 2024.
Kırkın made his ATP main draw debut at the 2018 Antalya Open in the doubles draw partnering Koray Kırcı.