Deniz Eren Donmazer

Dönmezer was still a teenager when Adana Demirspor handed him a Süper Lig debut against Antalyaspor in May 2024, a match the club lost 1–2. Three months later he made his first start, at home in a 0–1 defeat by Fenerbahçe. He stayed with the senior squad through the 2024/25 season.

The road there began in Hatay and ran through Çukurova Demirspor, where he spent two years as a boy before moving into the Adana Demirspor academy in 2019.

His move to Kayserispor in September 2025 was unusual in its shape. No upfront fee was disclosed; instead the clubs agreed a split on what he might be worth later, with Adana Demirspor keeping 80 per cent of any future transfer and Kayserispor 20. He signed for two to three years. In August 2026, reports said Hull City had reached an agreement to sign him for €1 million, with a development fee going back to Adana Demirspor.

Turkey have used him at youth level since he was thirteen: a single U14 appearance in 2022, two at U15 the same year, five at U16 across 2023 and 2024, and two apiece at U17 and U19 from 2025. He is right-footed. No individual awards or senior honours are on his record so far.