According to Marca, the Spanish side have put the price tag on his head after spending most of his time on the fringes of the first team.

Jose Mourinho is chasing the former Arsenal midfielder to add some steel to his midfield following the departure of Frank Lampard while midfield holder John Obi Mikel has been linked with a move to Valencia.

The Blues are rumoured to have launched a £10m bid for the Cameroon international to follow up their £27m signing of former Gunner Cesc Fabregas.