Real Sociedad midfielder Martin Zubimendi is set to undergo a medical before completing his move to Arsenal.
As reported by BBC Sport, the deal is close to being finalised, with all the relevant documents having been signed.
Arsenal have been heavily linked with a move for Zubimendi, who has a reported release clause of £51million.
The Spain international is set to become Arsenal's first signing of the summer transfer window as Mikel Arteta looks to bolster his options in midfield.
All payment structures regarding a deal for the 26-year-old have already been agreed between Arsenal and Sociedad.