The Yellow Submarine spent just one year outside the top flight, with a second-placed finish in the Segunda Division ensuring their return at the first attempt.
"I'm glad they're back in the first division," the Argentine told reporters. "They are a club I've followed a lot in the last decade.
"They have done well and despite having a bad season, they have recovered fast. It speaks highly of the leaders."
Villarreal are flying high in fourth place.