Tensions boiled over during a 2022 match against Montpellier. The two argued on-pitch over who should take a penalty, leading to reported "cold" interactions in the locker room.

Their chemistry was instant. Neymar's creativity paired with Mbappé's pace led PSG to domestic dominance and their first Champions League final in 2020. The Shifting Dynamic (2021–2023)

Neymar took the 18-year-old Mbappé under his wing, calling him "Golden Boy" and inviting him to his home for dinner.

Both joined Paris Saint-Germain in the historic summer of 2017 for record fees.

As Mbappé became the central figure of PSG's project, the "brotherly bond" cooled into a professional, often distant coexistence. The Final Whistle

Neymar left for Al Hilal in 2023, while Mbappé joined Real Madrid in 2024.

According to Neymar, the arrival of Lionel Messi in 2021 changed things. He claimed Mbappé became "jealous" of his attention being shared.

The relationship between Kylian Mbappé and Neymar Jr. is one of the most high-profile "big brother, little brother" stories in modern football, evolving from a telepathic mentorship into a complicated rivalry. The "Golden Boy" Era (2017–2020)