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Metin Mert
Personal information
Birth name	Detlef Müller
Date of birth	21 May 1965 (age 59)
Place of birth	Duisburg, West Germany
Height	1.80 m (5 ft 11 in)
Position(s)	Goalkeeper
Youth career
	SV Wanheim 1900
	Duisburger SV 1900
	VfB Homberg
0000–1984	VfL Bochum
Senior career*
Years	Team
1983–1985	VfL Bochum II
1985–1988	Westfalia Herne
1988–1995	Sarıyer
1995–1997	Trabzonspor
1997–2002	Kocaelispor
2002–2003	Konyaspor
2003–2004	Antalyaspor
Managerial career
2005–2006	Ankaragücü (assistant coach)
2006–2008	Rizespor (goalkeeping coach)
2008	Ankaraspor (goalkeeping coach)
2008–2009	Malatyaspor (goalkeeping coach)
2009–2010	Eyüpspor (goalkeeping coach)
2010–2011	Denizlispor (goalkeeping coach)
2011–2014	Akhisar (goalkeeping coach)
2014–	Galatasaray (goalkeeping coach)
	*Club domestic league appearances and goals

Metin Mert (born Detlef Müller; 21 May 1965) is a German-born naturalised Turkish professional footballer who played as a goalkeeper.

Career

Detlef Müller was born Duisburg, West Germany. His first Oberliga game for Bochum II was on 31 December 1983 in a 3–0 win against Hammer SpVg. He was substituted on in the 75th minute for Markus Croonen. In summer 1985 Müller transferred to Westfalia Herne, where he played until 1988.

During a vacation to Turkey in 1988 Müller was spotted by Erdal Keser playing Beach soccer. He was offered a contract from Sarıyer out of the Turkish First Football League, which he accepted.

Career statistics

Appearances and goals by club, season and competition
Club	Season	League			Cup^[a]		Continental		Total
Club	Season	Division	Apps	Goals	Apps	Goals	Apps	Goals	Apps	Goals
VfL Bochum II	1983–84	Oberliga Westfalen	5	0	—		—		5	0
	1984–85	Oberliga Westfalen	0	0	0	0	—		0	0
	Total		5	0	0	0	0	0	5	0
Westfalia Herne	1985–86	Oberliga Westfalen	27	0	—		—		27	0
	1986–87				—		—
	1987–88				—		—
	Total				0	0	0	0
Sarıyer	1988–89	1.Lig					—
	1989–90						—
	1990–91		29	0	2	0	—		31	0
	1991–92		22	0	1	0	—		23	0
	1992–93		19	0	2	0	—		21	0
	1993–94		25	0	2	0	—		27	0
	1994–95	2.Lig	20	0	3	0	—		23	0
	Total
Trabzonspor	1995–96	1.Lig	19	0	1	0	1	0	21	0
	1996–97	1.Lig	0	0	0	0	0	0	0	0
	Total		19	0	1	0	1	0	21	0
Kocaelispor	1997–98	1.Lig	11	0	2	0	0	0	13	0
	1998–99		5	0	0	0	—		5	0
	1999–2000		10	0	0	0
	2000–01		28	0	3	0	—		31	0
	2001–02	Süper Lig	19	0	4	0	—		23	0
	Total		73	0	9	0
Konyaspor	2002–03	1.Lig	34	0	2	0	—		36	0
Antalyaspor	2003–04	1.Lig	14	0	1	0	—		15	0
Career total