Manchester United manager David Moyes sent a scout to watch Valencia left-back Juan Bernat during his side's 1-1 draw against Athletic Bilbao, reports in Spain claim.

The Daily Mail claimed earlier last week that Moyes has earmarked the Spaniard as one of the main candidates to replace Patrice Evra, who is expected to leave Old Trafford at the end of the season.

Valencia-based newspaper Super Deporte confirmed Moyes' interest in securing the Spaniard's services, adding that a United representative was at the Mestalla Stadium last weekend to monitor Bernat's development.

Moyes is desperately looking for a left-back to cover Evra's departure and he has also been linked with Southampton youngster Luke Shaw, Everton's Leighton Baines and Real Madrid star Fabio Coentrao.

However Bernat would be much more affordable, as the the 21-year-old is under contract at Valencia only until 2015, leaving the Spanish side with a choice of selling him at the end of the season or letting go for free the following summer. Furthermore, his release clause is understood to be around £20m.

Super Deporte claims that Valencia are trying to keep one of their most valuable players but the negotiations over a new contract has been unsuccessful until this moment.

Bernat has become a key player for Valencia after abandoning his original role as a winger for a deeper position, scoring one goal and grabbing two assists in 22 La Liga appearances this season.

Super Deporte also suggests the Manchester United scout could have tracked other players during Valencia's draw against Ahtletic Bilbao, especially considering that one of Moyes's main targets when he arrived to Old Trafford last summer was Ander Herrera.

After signing Juan Mata in January, it appears Herrera is not a United target anymore, but Super Deporte reports that Moyes may also be monitoring Dani Parejo, who has recently been heavily linked with Liverpool.