| Mert Çetin | |
| Fullname: | Yıldırım Mert Çetin |
| Birth Date: | 1 January 1997 |
| Birth Place: | Çankaya, Ankara, Turkey |
| Height: | 1.89 m |
| Position: | Centre-back |
| Youthyears1: | 2008–2016 |
| Youthclubs1: | Gençlerbirliği |
| Years1: | 2016–2017 |
| Clubs1: | Hacettepe |
| Caps1: | 30 |
| Goals1: | 1 |
| Years2: | 2017–2019 |
| Clubs2: | Gençlerbirliği |
| Caps2: | 27 |
| Goals2: | 1 |
| Years3: | 2019–2021 |
| Clubs3: | Roma |
| Caps3: | 6 |
| Goals3: | 0 |
| Years4: | 2020–2021 |
| Clubs4: | → Hellas Verona (loan) |
| Caps4: | 6 |
| Goals4: | 0 |
| Years5: | 2021–2024 |
| Clubs5: | Hellas Verona |
| Caps5: | 2 |
| Goals5: | 0 |
| Years6: | 2022 |
| Clubs6: | → Kayserispor (loan) |
| Caps6: | 10 |
| Goals6: | 1 |
| Years7: | 2022–2023 |
| Clubs7: | → Lecce (loan) |
| Caps7: | 1 |
| Goals7: | 0 |
| Years8: | 2023 |
| Clubs8: | → Adana Demirspor (loan) |
| Caps8: | 10 |
| Goals8: | 0 |
| Years9: | 2023–2024 |
| Caps9: | 18 |
| Goals9: | 0 |
| Clubs9: | → Ankaragücü (loan) |
| Nationalyears1: | 2019– |
| Nationalteam1: | Turkey |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Club-Update: | 25 June 2024 |
| Ntupdate: | 17 November 2019 |
Yıldırım Mert Çetin (born 1 January 1997) is a Turkish professional footballer who plays as a centre-back for Ankaragücü on loan from Italian club Hellas Verona. He also represents the Turkey national team.
Çetin made his professional debut for Gençlerbirliği in a 2–1 Süper Lig loss to Kayserispor on 19 November 2017.[1]
On 16 August 2019, Çetin joined Italian Serie A club Roma.[2] He was sent on a one-year loan to Hellas Verona on 25 August 2020, with an option to purchase.[3]
On 15 January 2022, Hellas Verona announced that Çetin had been loaned to Turkish club Kayserispor.[4]
On 6 August 2022, Çetin joined Lecce on loan with an option to buy.[5]
On 19 January 2023, Çetin was loaned to Adana Demirspor, with an option to buy.[6]
On 10 July 2023, Hellas Verona announced that Çetin had been sent on a season-long loan to Ankaragücü, with a future option to buy.[7]
He made his debut for Turkey national team on 17 November 2019 in a Euro 2020 qualifier against Andorra, substituting Merih Demiral in the 80th minute.[8]