straight to your inboxNapoli coach Gennaro Gattuso has said that Kalidou Koulibaly will not be sold if Manchester City don't meet their valuation.City have identified Koulibaly as their principal target as they look to secure a long-term partner for Aymeric Laporte at the back, but negotiations have been slow with frosty relations between the two clubs from the fallout of the Jorginho transfer two years ago.Despite missing out on their top target last summer because they refused to meet