Portsmouth have agreed a fee with Middlesbrough for defender Gianluca Festa.
The Italian has also agreed personal terms with the Fratton Park club and will sign if he passes a medical on Thursday afternoon.
A Pompey spokesman said: "It will be a good signing.
"Harry (Redknapp) has been looking for more numbers at the back.
"He feels it’s important to have a good backline and Festa’s got good experience."