According to a report from Eldesmarque (translated by Daily Star), Jose Mourinho has asked Spurs to sign the Senegalese centre back.
Spurs are could lose Alderweireld and Vertonghen at the end of this season and it seems that Mourinho is already planning for life without them.
Koulibaly is one of the best defenders in the world and he would be a sensational addition to Spurs.
It will be interesting to see if the Londoners can afford him. Napoli are very stubborn when it comes to the valuation of their players and Levy will have to agree to their demands if Spurs want to land Koulibaly.