Arsenal will now challenge Liverpool and Manchester United in the summer transfer window to sign an in-demand defender as Mikel Arteta has identified his top target. The north London outfit have produced an imperious defensive record so far this season. Yet Arteta wants Arsenal to sign another centre-back in the summer who can add depth to a key position. William Saliba and Gabriel Magalhaes have been near ever-presents of his defence. Saliba is the only player to start all 36 of Arsenal’s Premier League games so far this term. He has also played the most minutes at Emirates Stadium with 3,240…