On 19 November 2015, Galatasaray manager Hamza Hamzaoğlu left his position as a result of mutual agreement. On 22 November 2015, Denizli said "Galatasaray's president called me. I am going to meet with him tomorrow, negotiating for managerial position" on TRT Spor broadcast. A day later, Galatasaray's president Dursun Aydın Özbek met with Denizli at Point Hotel Beşiktaş, Istanbul and he said "I offered managerial position to Mustafa Denizli and he accepted in principle. We will sign the official contract in a few days" on the press conference. Denizli commented "I started my career's unforgettable success' here and I want close the parenthesis here."