Arsenal appear to be picking up the pace as the transfer window comes to a close, with Mikel Arteta hungry for more after bagging his third summer signing. Mikel Merino was announced as an Arsenal player yesterday, joining from Real Sociedad in a deal worth around £37.5 million including add-ons. Prior to the move, Kieran Tierney told Merino that he would love life at Arsenal and Pierre-Emerick Aubameyang even commented on the Spaniard’s Instagram post, wishing him luck on the move. However, the excitement of the Merino signing has quickly worn off on Mikel Arteta as he looks to potentially di…