PSG beat Montpellier 2-0 this weekend, but following the information about the victories in the French media, Mbappe was unhappy with Neymar for not passing the ball to him and that the French striker was later seen express his displeasure to a teammate on the bench.
Pochettino was quick to downplay discussions over a feud between the star strikers, who are set to start tonight at Parc des Princes.
The French side drew in their Champions League Group A debut against Club Brugge, while City beat RB Leipzig.
“They (Mbappe and Neymar) are fantastic guys,” Pochettino said. “These things happen.
“There are always things between the best players. They are competitors who want to win and help the team succeed.
“I spoke to them individually. They might also have talked to each other and there were pictures of them having fun in practice. If there is a small incident, it can sometimes create a wave, but it’s really just talk.
Mbappe and Neymar hope to be joined in attack by Messi tonight, who is suffering from a knee bruise.
City boss Pep Guardiola said of his former Barcelona charge: “This type of player speaks for himself. I have nothing more to add. What he has done in his career is beyond exceptional and hopefully tonight he can play for the good of the game. “
City will be without Ilkay Gundogan due to injury, but John Stones is set to make his first start of the season.