Speaking to Het Nieuwsblad, he believes that it was 'too soon' to move to Anfield, claiming he has a lot to learn before making such a big move and that Rennes was the ideal destination rather than going to Liverpool.
Doku said: “I did a lot of research first, wrote down all the positive points and only then did I make a decision.
“I knew that I first wanted to make an intermediate step. Going to a top club now would be too soon. I still have a lot to learn and Rennes is the ideal place for that."