Diego Godin will hold a press conference on Tuesday to confirm his exit from Atletico Madrid, say reports in the Spanish press.
The Uruguayan defender is out of contract this summer and has been heavily linked with a move to Inter, who are said to have already agreed a deal with him.
La Sexta journalist Belen Sanchez Garcia has reported that the move to the Milanese giants will be confirmed at the conference, which will be held at midday.
She also reports that the home game against Sevilla on Sunday, which will be his final game in front of the Atleti fans, will have an event to commemorate his time in the Spanish capital.
Cadena Ser have claimed the Uruguayan defender will join the Nerazzurri on a two-year deal with the option of a third, worth an annual wage of €5.5m.
Godin has spent nine years with Los Rojiblancos and made 381 first-team appearances.
Juanfran Torres, Filipe Luis and Godin are all out of contract at Los Rojiblancos, while fellow defender Lucas Hernandez has already joined Bayern Munich.