 Arsenal made its first summer signing prior to start of the current season on 25 May, with the acquisition of Swiss midfielder Granit Xhaka for a reported £30 million fee.Xhaka's involvement in UEFA Euro 2016 and his subsequent desire to secure his club future beforehand enabled Arsenal to uncharacteristically complete a signing before the formal opening of the transfer window.In the following weeks, the Gunners activated the release clause of Leicester City forward Jamie Vardy.