Mbappe scored twice in Saturday’s 2-1 league win over Caen to reach the milestone at the age of just 20 and in a mere 76 matches since joining from Monaco.
He is already a World Cup winner, not to mention a two-time league champion in France, and Brazilian star Neymar backed Mbappe to scale even greater heights.
‘The relationship I have with him is the best possible, both inside and out of the pitch,’ Neymar told Brazilian broadcaster Globo.
‘I call him “Golden Boy”. He’s a boy for whom I have a very special affection, who will become one of the best players in football history, and I try to help him in the best way possible.
‘Whatever attitude he has in training or in the game I come and talk to him, or he comes to talk to me. It is as if he were a brother.
‘By competition, this is not what leads us to winning titles, thinking of individual titles… it is not because of that.
‘We do not envy each other. When he scores a goal, he wants to give me a pass, when I give him a pass, I want him to score a goal too.
‘We have this partnership, as I had with Lionel Messi as well [during his time at Barcelona].’
PSG, who presently enjoy a 17-point lead at the top of Ligue 1, enter the second leg of their Champions League last-16 tie with Manchester United on Wednesday with a two-goal lead.
Mbappe scored in the first leg at Old Trafford and has since taken his goal tally for the season to 29 in all competitions.
Neymar is presently out with a broken metatarsal and won’t return until close to the end of the season.