It has been reported that Everton have been keeping tabs on the three Naoli players with a view to making a move in the summer of 2019.
Allan, Milik and Koulibaly are three very important players for Napoli, and it is hard to see the Italian club sell any of them in the January transfer window.
Given Napoli’s regular chase for Serie A and intention to play in the Champions League on a regular basis, the Italian club may not sell them in the summer transfer window either, unless, of course, major bids come in.
Poland international striker Milik, 24, has scored 10 goals and provided one assist in 979 minutes of Serie A football for Napoli so far this season, according to WhoScored.
Brazil international central midfielder Allan, 27, has made 14 starts and four substitute appearances in Serie A so far this campaign, scoring two goals in the process, according to WhoScored.
Senegal international central defender Koulibaly, 27, has played 18 times in Serie A and in six Champions League games for Napoli so far this campaign, according to WhoScored.