De Telegraaf reports that the sale of Sivert Mannsverk to Sparta Praag yields Ajax 3.5 million euros, and the amount could potentially increase due to bonuses. On Saturday, Ajax announced that Mannsverk's move to Sparta Praag is definitive. Mannsverk played the past season on loan at the Czech club, which was not willing to exercise the option to buy. According to De Telegraaf, Jordi Cruijff decided to sell Mannsverk for a lower amount because the player had no future in Amsterdam and because Ajax could use the transfer fee and the saved salary. The newspaper adds that Mannsverk reportedly earned over one million euros per season.

Voetbalprimeur.nl reported that Ajax has reached an agreement with Sparta Praag over the transfer of Sivert Mannsverk. The agreement was announced by Ajax on Saturday afternoon. Mannsverk played the previous season on loan at Sparta Praag, which had an option to buy. It is reported that Sparta Praag wanted to pay less. The amount Ajax will receive for the player is not specified.

Livesport Zpráv reports that Sparta Praag wants to sign Sivert Mannsverk from Ajax for a lower amount than the agreed purchase option, that the Czech club will not exercise the purchase option in the loan contract for the 24-year-old midfielder but is open to a longer stay, and that Sparta Praag believes they can sign Mannsverk for a lower amount because he has to leave Ajax. The specific amount for the purchase option is not known, and Ajax's asking price is not disclosed. Mannsverk is under contract at Ajax until mid-2028.

Sivert Mannsverk is among the twelve notable signings made by Mislintat. He transferred to Ajax in the summer of 2023 from Molde for a fee of six million euros and receives a salary of 2.5 million euros in Amsterdam. Mannsverk has appeared in 18 matches for Ajax, scoring no goals, providing one assist, and receiving six yellow cards. He is set to collaborate with Brian Priske, the former coach of Feyenoord, at Sparta Praag, provided the final details are agreed upon. Last season, the 23-year-old was loaned to Cardiff City, but the club decided against making the transfer permanent. While Italian club Lecce expressed interest in Mannsverk, Sparta Praag is currently the frontrunner to secure his services, unless negotiations fail. Alex Kroes, Ajax's technical director, has reportedly managed to save 22.5 million euros in salaries during this transfer period.