Manchester United have been joined in the race for Argentine international Ezequiel Garay by Serie A giants Napoli, with Rafael Benitez identifying the central defender as a top transfer target.
Garay has been watched by United scouts at least three times in the last 12 months, adding to his growing reputation with a string of commanding performances for Benfica.
Moyes opted to pass on the opportunity to bid for the 27-year-old last summer, deciding that Nemanja Vidic and Rio Ferdinand had enough cover in central defence from the likes of Jonny Evans, Chris Smalling and Phil Jones.
Real Madrid were also rumoured to be mulling over a summer swoop for Garay, who has a £17m release clause, but also eventually passed as the centre-back surprisingly stayed in Portugal.
Napoli have now become the latest team to show an interest in the stopper and have made signing a central defender their number one priority in the January transfer window, according to the Daily Star.
With genuine competition Moyes may be forced to move before next summer in a bid to bring Garay to Old Trafford, particularly with Rio Ferdinand's contract expiring at the end of the season.