Arsenal has officially signed Mikel Merino from Real Sociedad for an initial fee of £27.4 million, potentially rising to £31.6 million with add-ons. The 28-year-old midfielder, who has signed a four-year deal with an option for another year, is expected to bolster Arsenal's midfield alongside Declan Rice and Martin Odegaard. Merino's move comes after strong performances in Euro 2024, where he helped Spain secure the title. Arsenal manager Mikel Arteta expressed his excitement, highlighting Merino's experience and versatility as crucial for the team's title ambitions. The midfielder has already joined his new teammates in training and is set to wear the number 23 shirt, with a debut possible against Brighton. Both Arteta and sporting director Edu emphasized that Merino was a key target and will enhance the squad's quality and depth as Arsenal aims for Premier League success.