The 21-year-old arrives on a three-year deal at the Liberty Stadium as the Premier League club step up their activity in the transfer market.

Pozuelo was out of contract with the Liga club, but as he is under the age of 24 the Spanish side are entitled to a fee.

He becomes the third Spaniard this week to sign for the club - following the arrivals of his former Betis team-mate Jose Canas and Espanyol defender Jordi Amat - taking the total contingent at the club to seven.

Pozuelo cannot wait to get started in the English game.

"I am very happy to have joined Swansea City. Since I’ve been a little boy it has been my dream to play in the Premier League,” Pozuelo told the club's official website.

"From the moment I heard of the interest from Swansea I have watched their games and followed the news at the club.

"The style of the team suits me, and so too does the style of the manager.

"Of course, there are a lot of Spanish players here including my old Betis team-mate Jose Canas, and that will help me to settle quickly.

"I am looking to improve my English immediately as I want to communicate better with my team-mates. On the pitch I just want to give everything I have to the club in order to help the team this season."

On a busy day of transfer activity at the Welsh club, boss Michael Laudrup also strengthened his side with the captures of promising youngsters Gregor Zabret and Alex Gogic.

Slovenian goalkeeper Zabret, 17, has arrived from NK Domzale, while 19-year-old midfielder Gogic - a Cyprus Under-19 international - has signed from Greek side Olympiakos.

Gogic has signed a one-year contract on a free transfer, while Zabret joins on a two-year deal for an undisclosed fee.

Leaving the club, albeit temporarily, is defender Kyle Bartley, who has agreed a season-long loan with Championship side Birmingham.