The 22 year old has been linked with a move to Real Madrid in the summer but it looks like the Premier League side will provide competition to sign the Real Sociedad player.
TMW have reported that Manchester City will make a move for Martinez as replacement for the departing Joleon Lescott.
Martinez has established himself as one of the best young defenders in La Liga which has brought him to the attention of other clubs.
His performances this season haven’t gone unnoticed by the Spanish national team after he was called up for their friendly match against Italy this week.