Vergini is currently on loan at Sunderland from Estudiantes.
The 26-year-old centre-half agreed a loan deal to the Stadium of Light in January 2014, and a report in the Sunderland Echo claims that he is expected to agree a permanent switch to Wearside this summer.
Originally, the Argentine international signed on loan until the end of last season, but in the summer he agreed an extension until the end of this season, with Gus Poyet still in charge at the club.
He has since made 51 appearances for the Black Cats, 37 of which have been this season, and his versatility to play at full-back as well as centre-back has proven vital in a Sunderland defence that has been incredibly porous this term.
At 26-years-old he still has time to improve, and if able to secure a permanent deal for a cheap price Sunderland would be wise to take it. Vergini has not been exceptional since his arrival of Wearside, but he has impressed when called upon in various capacities, and his signing would at least provide cover for the defensive positions, with John O’Shea and Wes Brown showing their lack of fitness in their advanced age.
Brown is out of contract this summer, along with Anthony Reveillere, and both are expected to leave the club at the end of their deals, whilst Sebastian Coates is reaching the end of his loan deal and will return to Liverpool.