Porto have continued their intensive summer of rebuilding with the signing of left-back Jose Angel on a free transfer.
The 24-year-old, who has spent the last two seasons on loan at Real Sociedad from Roma, has signed a four-year deal.
Porto also confirmed via a statement on their website that the Spaniard has a 30 million-euro release clause.
"It is a great joy to be here,'' he told the club's official website. "For me it is a huge challenge, because I think it is a great club that is creating...