Tchatchoua has moved to Molineaux for €12.5m, signing a deal to 2030.
He told the club's website: “I feel good. I feel happy to be here and I’m excited. I spoke a little bit with the coach, but I’ll speak more. The Premier League is one of my dreams and it's one step that I want to do in my life, and also the history of the club, the stadium, the fans, this convinced me.
“I can play wing-back, I can play full-back. I will play the position of the coach puts me on the pitch, for the team and for the coach.
“My first impressions are that we have everything here. It's not too big, it's not too small, it’s very good. I spoke with some people from the club and everyone enjoys it. I feel a good atmosphere in this club. I'm very excited to play. It's one of my dreams, and I want to conquer this dream.”