Yıldırım Mert Çetin (born 1 January 1997) is a Turkish professional footballer who plays as a centre-back for Ankaragücü.
Çetin made his professional debut for Gençlerbirliği in a 2–1 Süper Lig loss to Kayserispor on 19 November 2017.
[3] On 15 January 2022, Hellas Verona announced that Çetin had been loaned to Turkish club Kayserispor.
[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.