Portsmouth have accepted a "substantial" bid from Real Madrid for midfielder Lassana Diarra.
The 23-year-old, currently sidelined by an ankle injury, has been given permission to talk to the Spanish giants.
A spokesman for the Barclays Premier League club told the club's official website, www.pompeyfc.co.uk: "We have always said we would only allow our players to leave if we received an exceptional bid."
Although the exact figure Real Madrid have offered is unknown, reports have suggested the deal could earn the south coast club as much as £24million.
The club spokesman added: "We could not stand in the way of a move such as this for Lassana.
"It shows how far the club has come under the ownership of Alexandre Gaydamak when Real Madrid come in for one of our players.
"Should the deal be completed, the club have already identified possible replacements."
Diarra, who signed a three-and-a-half-year contract when he joined from Arsenal in January for around £5million, previously played for French Ligue 1 side Le Havre and Chelsea.
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