Aston Villa signed Spanish defender Alex Moreno from Real Betis for a reported £13 million ($15 million) on Wednesday.
Moreno will move to the Premier League club subject to international clearance and a visa application.
The 29-year-old left-back becomes Unai Emery's first signing since he replaced Steven Gerrard as Villa boss in November.
"Alex is a good player that can help our squad. He has been one of the top left-backs in La Liga over the past few seasons and we are delighted to have him here," Emery told Villa's website.
Moreno will compete with Lucas Digne for a spot in Villa's defence and can also play on the left side of midfield.
He made 122 appearances for Betis, scoring six times, after moving from Rayo Vallecano.