Ajax Amsterdam is listed among the notable clubs interested in signing Tjark Ernst. It is reported that his contract includes a release clause of only five million euros. Tjark Ernst wants to play in the top division starting next season. Hertha BSC would like to extend the contract with the player, but only have a chance of doing so if the club achieves promotion.

Ajax and Gladbach are interested in Hertha BSC's 22-year-old German goalkeeper, Tjark Ernst. In response to the interest, Ernst stated that he views it as a confirmation of his performance and nothing more. He emphasized that he is entirely focused on the present and the second half of the season with Hertha. He mentioned that while one can never rule anything out in football, he reiterated that his sole objective is to achieve promotion with his club. The Germany U21 international has made 17 appearances in the 2. Bundesliga this season and has a contract that runs until June 30, 2027. According to Transfermarkt, his current market value is €4.00m. A report in November 2025 stated his contract could be bought out for €5 million, and another report mentioned a release clause for summer 2026.