He has managed many notable Turkish football clubs, including "Istanbul Big Three" (Fenerbahçe, Galatasaray and Beşiktaş) and has won the Süper Lig title three times.

Denizli was appointed manager of FK Khazar Lankaran on 3 December 2013, with a one-and-a-half-year deal.

[2] He also has worked outside Turkey with Alemannia Aachen in Germany, Pas and Persepolis in Iran and Khazar Lankaran in Azerbaijan.

He spent 17 years with his hometown club Altay in İzmir, gaining a reputation as one of the best players in the position of attacking left forward in the league's history.

Denizli is the only one in Turkey who have won the national league with the ""three biggest"" football clubs; Beşiktaş, Fenerbahçe and Galatasaray as a manager.

2 June 2010 According to a number of reports from Turkey, experienced gaffer Denizli has resigned as head coach of Süper Lig titans Beşiktaş for medical reasons.

[3] On 19 November 2015, Galatasaray manager Hamza Hamzaoğlu left his position as a result of mutual agreement.

"[6] Before the signing, Denizli followed UEFA Champions League match, Galatasaray played with Atlético Madrid in Vicente Calderón Stadium.

[7] On 26 November 2015, he signed a contract until June 2017 in Florya Metin Oktay Sports Complex and Training Center.