N FC's Craig Burley says Alexis Sanchez needs to leave Arsenal. Manchester City's move for Alexis Sanchez would enable Pep Guardiola to rectify some of the problems he has faced so far in England.  "We need to improve in both boxes, both offensively and defensively, to score goals and not concede," has been a theme the City boss has returned to throughout his debut season at the club. While the defence will be the main focus of this summer's overhaul, with at least two full-backs and a centre-half expected to arrive at the Etihad, Guardiola is determined to improve his forward line. And the Catalan knows all about the qualities of Sanchez after taking him...
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