Lazio are moving for Cerro Portena defender Nelson David Cabrera.
The Paraguay international could move to Lazio in an initial loan agreement and the Rome club's chief, Miguel Zelada, said: "We found an agreement to take the player on-loan for a year. But then the Paraguayan club demanded he be sold.
"The negotiations are difficult, but we are continuing them. By the end of the year, we are confident he will join us."