Manchester United are understood to have joined the clutch of clubs keeping tabs on Granada full-back Guilherme Siqueira.
The Brazilian-born Italian full-back joined Granada on a permanent basis last summer from Udinese after spending the previous campaign on loan with the Spanish club.
Even though the former Inter Milan man is technically owned by Granada, Udinese still control his future as their president Giampaolo Pozzo owns both clubs.
Reports in Spain claim that both Barcelona and Benfica are both keen on landing the 25-year-old left-back - who has three years left on his current deal.
But United are also believed to be interested after it emerged that their chief scout Martin Ferguson has attended Granada's last two matches.