straight to your inboxTop Manchester City transfer target Kalidou Koulibaly is eyeing a switch to Paris Saint-Germain, according to reports.After their defensive frailties played a major factor in them losing their Premier League title last season, City are working hard on strengthening their back-line this summer.The versatile Nathan Ake has already been signed from relegated Bournemouth but the club also want to bring in another top quality centre-back before the window closes on October