The defender, who scored the only goal of the game as Alaves defeated Athletic Club Bilbao 1-0 on Sunday, has a 25 million Euro ($27.2 million) buyout clause with Atletico, where his brother, Lucas is a member of the Atletico first team squad, reports Xinhua news agency.
According to reports, the move on Monday also comes just two days before Atletico attempt to overturn the 3-0 defeat they suffered to Real Madrid in the first leg of the Champions League semi-final between the two sides.
FC Barcelona were also reported to be interested in Hernandez, but the defender preferred to join Real Madrid.
Alaves meanwhile published a statement on the club website stating they knew nothing about Hernandez's Real Madrid medical and did not know where the player was.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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