33-year-old Callejon is out of contract this summer and will return to Spain after seven years in Naples. Valencia have offered the former Real Madrid forward a two-year contract.
With Dries Mertens also possibly on the way out, Napoli are in search of attackers to replenish Rino Gattuso’s squad.
And reports today state Brazil international Everton is the chosen one to replace Callejon in Napoli’s attacking trident.
A number of European clubs, including Manchester City, have coveted the 24-year-old Gremio ace.
However, it is Napoli who have taken steps towards signing the highly-rated forward. Sporting director Cristiano Giuntoli has began probing Gremio to learn if they are open to negotiations.
Everton is valued at €30m by his club, but with the COVID-19 crisis affecting the market, Napoli hope to get that down to €25m.
The Partenopei intend to offer €25m plus future bonuses in the coming days, it is reported.
Everton would not be a like-for-like Callejon replacement – he isn’t as defensively strong – but his attacking qualities are what Napoli want.
The left-footer has been a prominent player for Gremio, scoring 47 goals since breaking into the first team in 2014. He has also won 14 caps for Brazil, finding the net three times.