A Spanish media report revealed a surprising development in the transfer of Nico Williams, the Athletic Bilbao player, to Barcelona during this summer's transfer market.

The Catalan newspaper "Mundo Deportivo" mentioned that the deal for Nico Williams has "stopped" after the player's representatives requested written guarantees from Barcelona for his registration next season, which the club deemed unacceptable.

The source added that Barcelona had agreed with the player on the contract duration and salary, but once the process of turning this verbal agreement into official contracts began, negotiations completely halted between the two parties.

The newspaper indicated that Nico Williams' agent fears a repeat of what happened with players like Dani Olmo and Pau Victor, who faced difficulties in their registrations, which left a negative impact on Williams and his representatives.

Despite assurances from Barcelona's management that the club's financial situation and its movements within the Financial Fair Play regulations are improving, these reassurances have not yet been sufficient to convince the player and his agent.

The source concluded that Barcelona does not intend to abandon the deal at this time, but at the same time expressed its dissatisfaction with the course of negotiations in recent days.