Di Nenno and Stupaczuk have therefore ended the partnership between Belluati and Lamperti, who announced they would go their separate ways from the Reus Open 500 onwards.
Three-time title winners in 2023 Arturo Coello and Agustin Tapia started their campaign in Paraguay nicely, beating the capable couple of Jaime Muñoz and Nacho Vilariño in straight sets.
The Spanish-Argentinian have pushed their winning streak to 14 matches as they have yet to lose this season, while reigning number ones Juan Lebron and Alejandro Galan returned to winning ways at the SND Arena after.
Watch the highlights below!
Matches in chronological order:
Arturo Coello (ESP)/Agustin Tapia (ARG) (2) vs Jaime 'Chipi' Muñoz (ESP)/Nacho Vilariño (ESP)
Juan Lebron (ESP)/Alejandro Galan (ESP) (1) vs Juan Martin Diaz (ESP)/Agustin G. Silingo (ARG)
Martin Di Nenno (ARG)/Franco Stupaczuk (ARG) (3) vs Juan Cruz Belluati (ARG)/Miguel Lamperti (ARG)