And, with Felix starting just three times in the Premier League so far this season, Villa could reignite their interest before the January transfer window closes.
Whether a move would be permanent or on loan may depend on another piece of business.
Patrick Dorgu's former manager has urged him to reject Manchester United.
Jens Fonnskov Olsen managed Dorgu when he was part ofDenmark's Under-19s setup.
He told Tipsbladet: "If I have to be a little cheeky, I hope he chooses something other than Manchester United right now.
"I don't know if it's a bad fit, but they're just in a period where... I don't know if you can afford to say no to United, but maybe somewhere where there's a little more structure and where things fit in with his pace.
"Sometimes things have to go in the right order, if you can say it like that.
"The thing is that there are many paths to the goal."