While possibly sealing the deal with Porto on Hector Herrera next week, Napoli management are monitoring, as an alternative option, Belgian international midfielder Axel Witsel (27).
Also tracked by Juventus, Inter, AS Roma, Borussia Dortmund, Chelsea and Stoke City as well, former Standard Liège and Benfica star, playing for Zenit Saint Petersbourg since 2012/13, is still on a deal with them until June 2017, and might leave on an about €23/£17.5m offer.
Source: transfermarketweb.com