Swansea expect to complete the signing of Argentina World Cup defender Federico Fernandez on Tuesday.
The 25-year-old will make the move to the Liberty Stadium from Italian side Napoli for a fee understood to be in excess of Â£7million.
Fernandez will be a direct replacement for Chico Flores, who joined former Swansea manager Michael Laudrup in Qatar last week.
The centre-half made nearly 60 appearances for Napoli after arriving from Argentinian club Estudiantes in 2011 but went out on loan to Spanish club Getafe last season where he made 14 La Liga appearances.
Fernandez started the first four of Argentina's matches during their run to the World Cup final in Brazil before missing the rest of the tournament through injury.
The player spent Monday in Swansea undergoing the final part of his medical and the deal will be completed on Tuesday.
Fernandez should make his Swansea debut at home to Burnley on Saturday as Garry Monk's men seek to build on their shock 2-1 opening-day victory at Manchester United.