He's been doing well, Monaco is a high-risk team and has conceded a fair few but he's been a key player for them and now has more minutes under his belt in a more competitive position this season. He actually spoke about deciding to stay at Monaco and rejecting a team (presumably us). Seems as if he doesn't have his heart on moving to us.
https://www.getfootballnewsfrance.c...at-all-about-not-moving-to-manchester-united/
“It was the right choice, first off is I have not enjoyed good seasons since I have been at Monaco. We played to stay up and so now I am really experiencing the top of the table and I think that continuing with the club that formed me was the right decision and this is being proved by the season that we are having.”