Watford boss Adrian Boothroyd is lining up a deal to take Real Murcia defender Sietes to Vicarage Road.
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The 31-year-old left-back, full name Jose Manuel Suarez Rivas, needs to finalise the end of his deal with the Spanish club before moving to England.
"Sietes will be on his way to Watford as we continue to try and improve the squad," Boothroyd told BBC Sport.
Sietes has played over 300 games in Spanish football and has represented Valencia in the Uefa Cup.