L'Equipe reported that Bayer Leverkusen made a proposal of 25 million euros plus bonuses for Leonardo Balerdi in the spring period. Leonardo Balerdi was not convinced by the potential move to Bayer Leverkusen, even though the club is qualified for the next season's Europa League. Balerdi chose to remain under contract with Marseille until 2028 and refused the transfer. Afterwards, Balerdi sustained a calf injury with Argentina just before the World Cup, which resulted in his withdrawal.

Olympique de Marseille planned to transfer Leonardo Balerdi, and a deal was arranged for the central defender to join Bayer Leverkusen for 25 million euros plus bonuses. However, the Argentine international was not convinced by the German team's proposal. Balerdi's contract runs until June 2028, but a calf injury could potentially slow down negotiations, with several other clubs also linked with the player.