The 21-year-old joined Fiorentina from the Biancocelesti in the summer.
“For me Saturday evening will be a strange game, seeing that I will return to my old ground, in Rome,” De Silvestri explained.
“I have always been a Lazio fan and I have many friends in the Curva Nord, but I now play for Fiorentina.
“We will beat them again in the League just as we did in the Coppa Italia,” De Silvestri concluded.