Detlef Müller

Detlef Müller — Biography

Detlef Müller, also known in Turkish football as Metin Mert, is a German-born goalkeeper. He kept goal for years at Sarıyer, Trabzonspor and Kocaelispor, became a Turkish citizen, and at one point held the record as the foreign player with the most Süper Lig appearances. After playing he worked at Turkish clubs as a goalkeeping coach.

One of five children, he began playing at six and played in Germany for Bochum and Westfalia Herne. On a holiday in Turkey in 1988 he caught the eye of Erdal Keser while playing beach football, and on August 15, 1990, he signed with Sarıyer. He stayed until May 1995, during which time he became a Turkish citizen and took the name Metin Mert.

In 1995-96 he moved to Trabzonspor, sharing the goal with Metin Aktaş and Nihat Tümkaya for a team that narrowly missed the title, and stayed three seasons. He then spent five years at Kocaelispor, winning the 2002 Turkish Cup. After one season each at Konyaspor and Antalyaspor he retired at 39.

He began coaching in 2005-06 as Safet Sušić's assistant at Ankaragücü, then worked as goalkeeping coach at Çaykur Rizespor, Ankaraspor, Malatyaspor, Eyüpspor, Denizlispor and, from 2011 to 2014, Akhisar Belediyespor. In December 2014 he joined Galatasaray as Hamza Hamzaoğlu's assistant and in December 2015 moved to Bursaspor.