"Villarreal and Porto have reached an agreement for the loan of Asturian striker Adrian Lopez, who will play the 2015-16 season with the Yellow Submarine," Villarreal said in a statement on their website.

Adrian joined Porto just a year ago for 11 million euros ($12.3 million, £8 million) after winning La Liga with Atletico in the 2013/14 season.

However, he scored just once in 18 appearances with the Portuguese side last season.

The 27-year-old becomes Villarreal's 10th signing of the transfer window and joins an impressive array of attacking talent alongside Roberto Soldado and Cedric Bakambu, who combined for all three of Villarreal's goals in Friday's 3-1 win over Espanyol.