As a result of their summer transfer plans, Arsenal would be willing to sell a player who has previously been indispensable for Mikel Arteta. It’s slightly too strong to suggest that there will be a squad overhaul at the Emirates this summer, but Edu will oversee several moves in both directions. Arteta is thought to have briefed three priority signings this summer: a striker, a central midfielder and a new left-back. But should the club see the necessary departures, they could also then strengthen on the wing, and perhaps find better cover at centre-back. And when you consider that Eddie Nket…