Lazio president Claudio Lotito is in talks with Inter Milan about several of their players.
Lotito has rejected an offer from Inter for fullback Aleksandar Kolarov, but remains in negotiations over a number of their players.
Davide Santon and Rene Khrin are both regarded highly by Lazio coach Davide Ballardini.
Ballardini has also asked about Lazio taking over the loan of FC Twente striker Marko Arnautovic, who has been rejected by Inter coach Jose Mourinho.