A couple of years ago Jardim wasn't happy with him and benched him, then he suffered injuries: 2014/15 - 91 days, 2015/16 - 37 days. These things put him down mentally, Makelele helped him and he made quite a comeback. He's a talented player, got skills, physicality, but he is inconsistent. He needs to work on that.
He's got to have knee surgery, so he will be out 8 to 10 weeks. José Morito doesn't mind about it and wants to sign him !
I believe José got something going on with Chelsea, will he pull a Lukaku ?
My opinion FWIW, I like Lemar better.
Last but not least, most of former Monaco players didn't really panned out elsewhere (Christanval, Kondogbia, James, Ferreira-Carrasco, Kurzawa), Martial had a very good rookie year and then he vanished.
Edit: latest rumor having Mbappé back in Paris for another visit, Henrique told him how they gonna play him with Cavani. It is believed he liked that. He had a visit with ManC a couple of weeks ago, and Real doesn't want to pay him €12 mil/year as the evil empire is willing to.