Nicolas Otamendi's representative, Eugenio Lopez, is going to rely on prestigious agent Jorge Mendes to convince Valencia to let the Manchester United and Real Madrid target to leave the club for a cut-price deal this summer, according to Super Deporte.

After the Argentine international became the leader of the La Liga side's back-line last season, Lopez told Cadena Ser on 25 May that the player is ready to make a move to a bigger club during the summer transfer window and will make every effort to leave the Mestalla.

"Two months ago Nicolas already told [president] Amadeo Salvo he wants to leave Valencia this summer. Nicolas is comfortable with Valencia and the fans but will have an option to improve his career. If there's an offer from a club we consider a top club, and it benefits his family, Nico wants to go. There are many discussions with several clubs who want to sign Otamendi," Lopez then said.

But Valencia's president have since insisted the club is not going to facilitate his departure, and any suitors would need to meet his full €50m (£36m, $56m) release clause to acquire him.

The Spaniards have been equally vigilant in the last two transfer markets, forcing Tottenham to pay €30m for Roberto Soldado and Barcelona €20m for Jeremy Mathieu – even though both players tried to force the move for a cut-price deal.

According to Super Deporte, Lopez has grown frustrated about negotiating with the Valencia president without success and has decided to draft in Mendes to orchestrate the move.

The Valencia-based publication revealed earlier this week that Lopez had received offers from both United and Real Madrid to sign the centre-back but the clubs are not keen on meeting his €50m clause.

Lopez now hopes the close personal relationship between Mendes and Valencia's millionaire owner Peter Lim will help convince the club officials to let Otamendi go for a more reasonable price.

Mendes has been in charge of most of Valencia's negotiations since Lim took over the club last year, helping the La Liga side finish the season in fourth place following several years in the shadows.

Super Deporte points out that Lopez also represents Angel Di Maria, but last summer had to call in Mendes to orchestrate the move that saw the Argentian moving from Real Madrid to Old Trafford.