Chelsea manager Antonio Conte is watching Fiorentina trio Nenad Tomovic, Federico Bernardeschi and Milan Badelj, according to reports from Calcio Mercato.
The former Italy boss has ordered his scouting team to keep a close eye on the Viola players following the success of summer signing Marcos Alonso.
The left-back spent four seasons at the Serie A club and has established himself as the left-wing-back in Conte's 3-4-3 formation.
Midfielder Badelj is top of Conte's January transfer shortlist due to his impressive performances for Fiorentina this season, making 10 starts out of a possible 12.
Though Conte is likely to want to shift some of his current players, such as Cesc Fabregas, in order to make room for new arrivals.