Arsenal should make signing Douglas Luiz their priority ahead of trying to do a deal for Martin Zubimendi or Amadou Onana. Arsenal are clearly in the market for a new midfielder. The north London club are due a major overhaul in that part of the pitch. With Thomas Partey, Jorginho, and Mohamed Elneny all coming towards the end of their playing days and facing an uncertain future at the Emirates Stadium, only Declan Rice represents the long-term look of the Gunners’ midfield contingent. As such, Arsenal have been linked with a number of players who could offer them extra depth in this part of t…