According to Ouest-France, Hyun-seok Hong has been informed that it would be preferable for him to find a new club. He has been asked to leave the club to create space for new recruits.

According to L'Équipe, Hyun-seok Hong was not called up for the match at Marseille, a situation that is described as an invitation to leave.

Hyun-seok Hong, an offensive midfielder, will spend the upcoming season on loan at FC Nantes in Ligue 1. The loan fee is reported to be 400,000 Euro. Previously, Mainz acquired him for four million Euro from KAA Gent, but he hasn't justified the high transfer fee with his performance (23 Bundesliga appearances, one assist).

Hyun-seok Hong is on the sidelines at FSV Mainz and may return to Belgium. Belgian clubs are interested in a transfer, but specific teams are not mentioned. He previously played well at AA Gent, making a good impression. He is contracted with FSV Mainz until mid-2028, with a market value of 3.5 million euros.