The left back becomes Brendan Rodgers’ eight signing of the summer after the Reds agreed on a £12m deal with the Andalusian club.
The youngster was delighted after the completion of the deal saying, “In my view, Liverpool are the best club in England and I couldn’t waste an opportunity to come and play for them.
“I spoke with Xabi Alonso, Pepe Reina and Alvaro Arbeloa and they told me this is a spectacular club whose fans follow it in a very special way.
“They all told me I can grow a lot here as a footballer as this is a massive club. I’m very happy to be joining a club as big as Liverpool. I hope to give my best and do all I can to help.”