The talk this week has been all about the 2018 World Cup winner, who bagged a hat-trick as PSG thrashed FC Barcelona 4-1 in the first leg of their UEFA Champions League last 16 tie.
Los Blancos are reportedly keen on signing the PSG striker, who is yet to sign a new deal with the French giants but he won't come cheap.
French publication Le Parisien have reported that the Paris-based outfit will demand £175million for Mbappe's services, even though he has one year left on his current deal.
The 22-year-old recently revealed that he is yet to make a decision on his future.
"The PSG shirt is one that I cherish and carry in my heart," he said, as per the Sun.
"My future? It would be stupid to decide my future based on just one game.
"It's something to reflect on for the long term.
"I've always said that I'm happy here and games like that make you very happy."