Chelsea are to ask FIFA to investigate an alleged illegal approach for Arjen Robben by Real Madrid.
The Premiership champions have been angered after new Madrid president Ramon Calderon claimed his sporting director Predrag Mijatovic has 'been in touch' with the Dutch international, who is under contract st Stamford Bridge.
Calderon also claims to have spoken to Arsenal midfielder Cesc Fabregas and he is interested in signing unsettled Manchester United striker Ruud van Nistelrooy, following the appointment of former Juventus and AC Milan boss Fabio Capello as Madrid's new coach.
Chelsea chief executive Peter Kenyon confirmed the London club would be writing to world football's governing body.
'We are aware of comments regarding Arjen made by Ramon Calderon, the new president of Real Madrid, since his successful election,' Kenyon told the club's official website.
'The Arjen Robben situation could not be any clearer.
'There have been no meetings or conversations between the Real Madrid sporting director Predrag Mijatovic with any Chelsea officials, anyone mandated to act on Chelsea's behalf or Roman Abramovich, about Arjen's future.
'Any indication that a transfer is possible is completely untrue. We will not be entertaining any offers for Arjen, he is not for sale.
'Moreover, we note that Mr Calderon confirms that Real Madrid have spoken to Arjen. As a result of these various comments Chelsea will be writing to FIFA to ask them to investigate an illegal approach for our player by Real Madrid.'