Chelsea chief Michael Emenalo had scouts posted to Atalanta's 4-1 win at Chievo Verona.
TMW says Emenalo is having Atalanta fullback Andrea Conti watched closely.
Chelsea are also in talks this month with Atalanta for Conti's teammate, Franck Kessie.
Along with Chelsea, Sevilla also had reps in the stands to check on Conti and Kessie.
Chelsea are haggling with Atalanta over a price for Kessie, with the Orobici rating the Ivorian at & euro;40 million.