On 9 October 2008 he signed a 1-year contract with Beşiktaş. On 30 May the club claimed its 13th Süper Lig title under his guidance. 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. With 2008–09 league title, Denizli also clings to the achievement of being "the one and only Turkish coach Beşiktaş earned the league title with". 2 June 2010 According to a number of reports from Turkey, experienced gaffer Denizli has resigned as head coach of Süper Lig titans Beşiktaş due to medical reasons.