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| Height | - |
| Weight | - |
| Age | 20 years old |
| Birth Date | 14 September 2006 |
| Country | Türkiye |
| Preferred Foot | - |
| Position | Midfielder |
| Shirt Number | 22 |
| Team |  İstanbulspor |
Follow Demir Mermerci's latest matches in Turkish Cup and other competitions. Starting XI appearances, goals, assists and card contributions are listed in detail.
| Date | Opponent | Score | Min | Gls | Ast | Y | R | Rating |
|---|---|---|---|---|---|---|---|---|
| 16 Eyl 2026 | Yalova Yeşilovaspor | 2‑1 | - | 0 | 0 | 0 | 0 | - |
| 01 Mayıs 2026 | Adana Demirspor | 8‑1 | - | 0 | 0 | 0 | 0 | - |
| 25 Nis 2026 | Vanspor FK | 1‑3 | - | 0 | 0 | 0 | 0 | - |
| 09 Nis 2026 | Erzurumspor FK | 0‑1 | - | 0 | 0 | 0 | 0 | - |
| 04 Nis 2026 | Sakaryaspor | 2‑2 | - | 0 | 0 | 0 | 0 | - |
| 22 Mar 2026 | Bodrum FK | 0‑1 | - | 0 | 0 | 0 | 0 | - |
| 07 Mar 2026 | Bandırmaspor | 1‑0 | - | 0 | 0 | 0 | 0 | - |
| 03 Mar 2026 | Boluspor | 0‑0 | - | 0 | 0 | 1 | 0 | - |
| 21 Şub 2026 | Boluspor | 0‑1 | - | 0 | 0 | 0 | 0 | - |
| 17 Şub 2026 | Esenler Erokspor | 1‑4 | - | 0 | 0 | 0 | 0 | - |
| 04 Şub 2026 | Galatasaray | 3‑1 | - | 0 | 0 | 0 | 0 | - |
| 25 Oca 2026 | Manisa FK | 1‑0 | - | 0 | 0 | 0 | 0 | - |
| 14 Oca 2026 | Trabzonspor | 1‑6 | - | 0 | 0 | 0 | 0 | - |
| 17 Ara 2025 | Fatih Karagümrük | 0‑0 | - | 0 | 0 | 0 | 0 | - |
| 13 Ara 2025 | Sarıyer SK | 1‑2 | - | 0 | 0 | 0 | 0 | - |
| 03 Ara 2025 | Sarıyer SK | 6‑0 | - | 0 | 0 | 0 | 0 | - |
| 29 Kas 2025 | Erzurumspor FK | 4‑0 | - | 0 | 0 | 0 | 0 | - |
| 22 Kas 2025 | Sakaryaspor | 3‑3 | - | 0 | 0 | 0 | 0 | - |
| 07 Kas 2025 | Bodrum FK | 5‑0 | - | 0 | 0 | 0 | 0 | - |
| 26 Eki 2025 | Amed SK | 0‑0 | - | 0 | 0 | 0 | 0 | - |
Detailed per-match output including goals, assists and cards is listed above.
| Season | League / Cup | Team | M | G | A |
|---|---|---|---|---|---|
| 2025/2026 | Turkish Cup | İstanbulspor | 0 | 0 | 0 |
| 2025/2026 | 1. Lig | İstanbulspor | 0 | 0 | 0 |
| 2024/2025 | Turkish Cup | İstanbulspor | 0 | 0 | 0 |
| 2024/2025 | 1. Lig | İstanbulspor | 0 | 0 | 0 |
| 2023/2024 | Super Lig | İstanbulspor | 0 | 0 | 0 |
Season-level statistics highlight how the player performs across league and cup competitions.
These numbers reveal season-by-season form, tournament output and overall impact over time.
| League | Team | M | G | A | Y | R | Starts |
|---|---|---|---|---|---|---|---|
| Turkish Cup | Galata | 1 | 0 | 0 | 0 | 0 | 0 |
| Total | 1 | 0 | 0 | 0 | 0 | 0 | |
| League | Team | M | G | A | Y | R | Starts |
|---|---|---|---|---|---|---|---|
| Turkish Cup | İstanbulspor | 5 | 0 | 0 | 1 | 0 | 4 |
| 1. Lig | İstanbulspor | 20 | 0 | 1 | 0 | 0 | 1 |
| Total | 25 | 0 | 1 | 1 | 0 | 5 | |
| League | Team | M | G | A | Y | R | Starts |
|---|---|---|---|---|---|---|---|
| Turkish Cup | İstanbulspor | 5 | 0 | 0 | 0 | 0 | 5 |
| Total | 5 | 0 | 0 | 0 | 0 | 5 | |
| League | Team | M | G | A | Y | R | Starts |
|---|---|---|---|---|---|---|---|
| Super Lig | İstanbulspor | 4 | 0 | 0 | 0 | 0 | 0 |
| Total | 4 | 0 | 0 | 0 | 0 | 0 | |
This section summarizes season-by-season output, including appearances, minutes and first XI starts.
| League | Seasons | M | G | A | Y | R | Starts |
|---|---|---|---|---|---|---|---|
| 1. Lig | 1 | 20 | 0 | 1 | 0 | 0 | 1 |
| Turkish Cup | 3 | 11 | 0 | 0 | 1 | 0 | 9 |
| Super Lig | 1 | 4 | 0 | 0 | 0 | 0 | 0 |
| Total | 35 | 0 | 1 | 1 | 0 | 10 |
League totals by season and competition are listed above for quick performance tracking.
| Team | M | G | A | Y | R | Starts |
|---|---|---|---|---|---|---|
| İstanbulspor | 34 | 0 | 1 | 1 | 0 | 10 |
| Galata | 1 | 0 | 0 | 0 | 0 | 0 |
| Total | 35 | 0 | 1 | 1 | 0 | 10 |
| Teams | İstanbulspor, İstanbulspor U19 |
| National Team | No national-team career data found. |
Demir Mermerci has played for multiple clubs throughout his career. İstanbulspor, Galata and has made a total of 35 official appearances. Notably, his consistency during the İstanbulspor period has stood out in his career. Demir Mermerci, stands out with his professional career consistency.