ARSENAL have a huge summer of change on their hands – and many big deals are in the pipeline.The Gunners have agreed a £63.5million deal to sign Sporting striker Viktor Gyokeres.Elsewhere, Noni Madueke has left Chelsea’s camp in the US to have a medical at Arsenal, ahead of a £52million deal being completed.In other news, the Gunners are set for a fresh round of talks with Valencia for Christian Mosquera.WATCH THE CLUB WORLD CUP ON DAZNFollow ALL of the latest news, rumours and transfer updates from the Emirates below…