On the pitch, Mbappe, 27, has been incredible, scoring 42 goals and providing nine assists in his 44 games across all competitions.
The issues off the pitch appear to have swayed fan opinion, however. Mbappe recently spent club approved rest days in Sardinia, angering sections of the fanbase.
Mbappe is currently out with a hamstring injury sustained in late April against Real Betis, making him a doubt for Sunday's Clasico against Barcelona.
Real Madrid need to win that game in order to stop their arch-rivals from winning La Liga, and the fans believe Mbappe isn’t prioritising the club’s interests.
"In his free time, Mbappe can do whatever he wants, like any other player," head coach Alvaro Arbeloa said.
The fans disagree and launched a petition calling for the French forward to leave the club. It originally asked for 200,000 signatures, but has now reach over 18 million.