None at all.
There scoot from Barcelona at Louis II every week (for him and six or seven others players), they watch him since 2 or 3 years now, and the fact that he reminds the style of Messi (i'm not saying that he's/will ever be close to Messi's level...) with low gravity center, awesome ball driving close to his feet, great football IQ, play almost only with right foot etc make people think he will go to barca 100%.
I think he's a perfect match too, but it's not set right now, none at all. He's the closest one to leave this summer after Sidibe. 50/50 situation I'll say, he's just not sure that it's the perfect decision before World Cup.
But David Silva still got some years in front of him. If I were City, i'll all in for Fabinho or Mendy (Talking only about Monaco players). Everyone will be really expensive anyway, with Vadim Vasyliev. You can be sure that every Monaco players that don't want to leave [Like Lemar] will not be selled (except Sidibe).
For the quote, since Aguero doesn't Translate, Mbappé said : "I got a career plan since i'm really young... I know where I want to go, nothing will make me change my mind". He also said in this ITW that he want to let his name at Monaco before left, and at least play one year as a starter.