Arsenal have completed the signing of Spain international Mikel Merino from Real Sociedad.

The midfielder has signed a four-year deal at the Emirates Stadium, with the option for a further 12 months. Arsenal will pay an initial £27.4m with a further £4.2m in add-ons.

Merino becomes Arsenal's fourth signing of the summer, following the arrivals of Tommy Setford and Riccardo Calafiori, as well as the permanent acquisition of David Raya.

Merino featured in every one of Spain's matches as they won Euro 2024, including scoring a 119th-minute winner in the quarter-final against Germany after appearing as a substitute.

Image: Mikel Merino celebrates after scoring for Spain against Germany

The 28-year-old's combative playing style was a major part of his attraction to Mikel Arteta - Merino won more duels than any other player in Europe's top-five leagues last season - along with his winning mentality.

Arteta said: "Mikel is a player who will bring us huge quality with his experience and versatility. He has played at the top of the game at both club and international level for a number of seasons now.

"Mikel will make our squad significantly stronger, with...