Former Manchester United manager Jose Mourinho has no doubts about the potential of Joao Felix.

United are in talks with Benfica to sign Felix.

Mourinho told Eleven Sports: "To start with, I think it's more important to describe even superficially Benfica's team, which was the habitat where he developed, and which allowed him to have conditions for it.

"I think things start there a little bit. The Portuguese championship is a championship that obviously has a big gap between the top teams and the others that allows a team to develop a dominant game, which is what Benfica is developing at the moment.

"It's a dominating team, that enters the field and wants to win, wants to score, that doesn't have fears, that is winning by 1-0, 2-0 and that wants to win by three or four and that doesn't fear the power - that also isn't much - of the opponents. Joao is developing in a habitat created by Bruno Lage [the coach] and he develops his qualities.

"He said the other day that his position was that of a free role. A free role in high level football may not exist. A free role but subject to certain principles of play that he must know and surely knows.

"I think he's a player who has a fantastic ability. From the point of view of defensive organisation, it's better than what you might think. Usually when you say you have a free role, you think you're not defending. He defends and I think he defends well."