The defender was sold by Manchester United to the Yellow Submarine last week.
He said, “I’m really looking forward to starting a new adventure at an incredible club like Villarreal. I am proud and excited to play here, in this stadium and with the fans. I hope we enjoy ourselves together.
“The most important thing in football is to win and to have a good mentality. I promise the fans that I will give my best in training and in matches. I want to win and excite the fans. I’m ready to fight for this club and represent the fans every week.
“I am a defender who can play in any position in defence. I am aggressive. I like to defend and fight, but I can also play on the ball. I’m a complete defender who can do a lot with the ball, but also defend. I’m not afraid to take risks with the ball at my feet.”
On meeting coach Marcelino, he added: “I spoke to him a lot before he came. We talked about the position he wants me to play in and the type of player he likes. Marcelino has told me that I have to be patient and that he will be there to help me and for me to develop as a player and as a person.”