The Sun reports that Sunderland are keen on signing the £3million-rated defender in January.
The 24-year-old has impressed while on a season-long loan at Spanish side Rayo Vallecano.
The Sun reports that Sunderland are keen on signing the £3million-rated defender in January.
The 24-year-old has impressed while on a season-long loan at Spanish side Rayo Vallecano.
