Swansea City have completed the signing of Federico Fernandez from Napoli for an undisclosed fee.
It was confirmed last week by Swansea boss Garry Monk that a financial deal had been agreed between the two clubs for the 25-year-old's services, with personal terms and a medical still to be concluded.
The Argentine arrived in Wales on Monday and passed a series of medical examinations that afternoon, with a four-year contract being signed earlier today.
Fernandez, who will wear the number 33 shirt at the Liberty Stadium, featured on four occasions at the World Cup this summer as Argentina reached the final.