
Sevilla have not stated how much Boulahrouz will cost them, nor the price of purchase if the Dutch defender does well at the Estadio Sanchez Pizjuan next season.
Boulahrouz, an expensive purchase from Hamburg in August 2006, has been a disappointment at Chelsea and has clearly lost the confidence of coach Jose Mourinho.
Sevilla have denied that the Boulahrouz deal has any connection with a possible sale to Chelsea of right-back Daniel Alves.
According to English and Spanish media reports, Chelsea have made a 30-million-euro (41.3 million dollars) bid for Alves, who is currently playing for Brazil in the Copa America in Venezuela.
Liverpool and Real Madrid have apparently been put off by Sevilla's high price tag on Alves, but Chelsea still hold out hopes of luring the 24-year-old to Stamford Bridge.
Alves's agent Jose Rodriguez Baster is demanding that Sevilla accept Chelsea's bid, claiming that the player is keen to move to London.
DPA