| Personal information | |||
|---|---|---|---|
| Date of birth | May 31, 1942 | ||
| Place of birth | Çankırı, Turkey | ||
| Date of death | January 4, 2008 (aged 65) | ||
| Senior career* | |||
| Years | Team | Apps | (Gls) |
| 1957– | Eskişehirspor | ||
| – | Bursa Akınspor | ||
| – | Karabükspor | ||
| – | Muhafızgücü | ||
| – | Karşıyaka | ||
| – | Şekerspor | ||
| – | Kastamonuspor | ||
| National team | |||
| National Army Football Team | |||
| Teams managed | |||
| 1968– | Kastamonuspor | ||
| Turkey (assistant coach) | |||
| Adanaspor | |||
| 1975 | Zonguldakspor | ||
| 1975–1976 | Beşiktaş | ||
| 1977–1979 | Zonguldakspor | ||
| 1980–1981 | Adanaspor | ||
| 1981–1982 | Bursaspor | ||
| 1982–1983 | Mersin İdmanyurdu | ||
| 1984 | Adana Demirspor | ||
| 1984–1985 | Ankaragücü | ||
| 1986 | Kayserispor | ||
| 1986–1987 | Zonguldakspor | ||
| 1988–1989 | Adanaspor | ||
| 1989 | Gençlerbirliği | ||
| 1992–1993 | Denizlispor | ||
| 1994 | Konyaspor | ||
| 1994–1996 | Adanaspor | ||
| * Senior club appearances and goals counted for the domestic league only. |
|||
Gündüz Tekin Onay (31 May 1942 in Çankırı – 4 January 2008 in İstanbul, Turkey) was a Turkish footballer and coach who also trained Istanbul club Beşiktaş between 1976 and 1977. He is known for his success in discovering starlets and for his modesty. Additionally, he was the author of a system to explore and breed young talents for Turkish football.
He had begun his professional career in 1957 as a player of Eskişehirspor. Respectively he played for Bursa Akınspor, Kardemir Karabükspor, Muhafızgücü, Karşıyaka, Şekerspor and Kastamonuspor beside National Army Football.
He began to manage the teams when he was 26 with coaching Kastamonuspor in 1968. Afterward, he became the assistant of Abdullah Gegiç for National Team in 1969. He maintained this duty until 1972 as an employer of TFF. Onay entered Turkish League as the coach of Adanaspor at the age of 30. He worked in numerous teams for non-stop 21 years, which is record in Turkish football history as total of 462 matches. He coached successively Zonguldakspor, Beşiktaş, Bursaspor, Mersin İdmanyurdu, Ankaragücü, Kayserispor, Gençlerbirliği, Adana Demirspor alongside Konyaspor, Denizlispor when the teams were competing in Division 2. He was also chairman of Adanaspor.