Watford are set to sign Mauro Zarate to a long-term deal.
The Daily Mail says Watford expect to ratify the signing of Zarate from Fiorentina by Monday.
The former West Ham and QPR forward arrived in London for a medical on Saturday and is likely to sign on an initial loan with view to permanent £2.5million deal and a three year contract.
The 29-year-old has scored four goals in nine appearances for Fiorentina this season.