Manchester United have failed with a transfer bid for Spain and Valencia star David Silva, according to the player's agent.

Silva demonstrated the quality which has attracted the attention of United, Barcelona, Real Madrid, Liverpool, Chelsea, Roma and Internazionale with two goals as Los Che defeated Vitesse Arnhem 3-1 in a friendly at the Mestalla on Tuesday night.

"Silva is my player," coach Unai Emery said afterwards. "We are going to build a team and it's not possible for him to go to another club."

Emery added: "Valencia is a very big club with all the possibilities for him to achieve what he wants."

He put the hosts ahead with a delightful 20-yard curler following a quickly-taken free-kick and then killed the contest with a neatly-taken strike, rounding the keeper and to slot into an empty net on 75 minutes.

The playmaker has been linked with a transfer to Old Trafford, with Sir Alex Ferguson looking to add firepower ahead of the opening of United's Champions League and Barclays Premier League title defences.