Belgian media reported that Kevin de Bruyne made comments in the locker room that were hurtful to his teammates.
Lawyers representing the two parties met early on Wednesday after Mbappe, who joined Madrid this summer, had referred his case to the LFP's legal committee.
The International Tennis Integrity Agency (ITIA) had cleared the Italian of wrongdoing in August, and weeks later he won the US Open for his second major title.
Avani Lekhara was the first Indian woman shooter to win two medals at a single Paralympics in Tokyo 2020.
Nuri Sahin faces the biggest test of his mettle to date with his Dortmund team having looked inconsistent and still appearing to lack a clear tactical identity.