He is excited about playing alongside fellow Argentine Diego Novaretti and is keen to make an impact in Italian football.
"I'm really happy, everything has been defined. Finally I can stay with my new team-mates", he told Corriere dello Sport.
"I already know Novaretti, and I'm really happy to meet everyone.
"I thank Lazio for signing me and taking me to Italy, and to have given me this opportunity."