The 18-year-old went to show his respects to his opponent after PSG’s 5-0 victory at Celtic Park.
However, the Brazilian striker, who opened the scoring, pulled his hand away and exchanged in some verbals with the young defender.
This came after a moment earlier in the match where the pair taunted each other. Neymar flashed Ralston a 3-0 sign with his hands, which was the score at the time, before Ralston responded with an exaggerated laugh in the striker’s face.
Hoops fan @nonie_doyle wrote on Twitter: “Neymar acted like a spoilt baby while young Ralston showed he was the real man tonight...well done son.”