However, in order to complete the transfer, Arsenal will need to pay more than the €60m release clause in Zubimendi's contract. This clause is a standard feature in many player contracts, requiring the buying club to pay a certain amount to secure the player's transfer.

According to reports, the exact amount Arsenal will pay is higher than the release clause, but it will be possible to pay the fee in installments rather than all at once. This arrangement is often made to help clubs manage their finances and avoid a large upfront payment.

The deal between Arsenal and Real Sociedad is reportedly a result of a good working relationship between the two clubs. Mikel Arteta, Arsenal's manager, has a connection to the club as a former player, which has helped facilitate the negotiations.