Granada left-back Guilherme Siqueira has admitted it is flattering to be linked with a move to a big club after Manchester United reportedly sent another scouting mission out to Spain.
Chief European scout Martin Ferguson, brother of United manager Sir Alex, is understood to have been in attendance on Sunday as Granada lost 1-0 to Real Zaragoza in the Primera Liga.
It is believed to be the third time in a month that Siqueira has been watched by United as the Premier League champions consider their transfer options for the summer.
Siqueira, 25, is under contract with Granada until June 2015 and is thought to be valued in the region of €12million (£9.8m).
Speculation in Spain suggests that Granada would be prepared to listen to offers at the end of the season, with a number of other clubs also in pursuit.
Valencia are reported to have joined the race, while Barcelona and Benfica have also been linked with Siqueira in the past.
The Brazilian-born Italian is aware of the transfer talk and says he will have to think carefully about his future.
He said: "I am very happy with this news. If a good proposition arrives I am open to studying the subject."