Rio Ferdinand has urged Arsenal to go ‘all out’ and sign Newcastle United striker Alexander Isak, a player compared to Zlatan Ibrahimovic. There’s absolutely no movement at Arsenal even though we’re 16 days into the January transfer window. A move for a new striker seems more likely in the summer now, and Isak has been linked. Ferdinand thinks Mikel Arteta should go and get him. Rio Ferdinand urges Arsenal to sign Alexander IsakArsenal need a new striker as soon as possible. Gabriel Jesus is one of the best in the business in what he does but he’s not a prolific goalscorer. Eddie Nketiah and L…