Neymar declined to give Celtic defender Anthony Ralston his match shirt on Tuesday night because the superstar had already donated it to charity.

The Paris Saint-Germain icon has been criticised for appearing to snub Ralston after the final whistle, refusing to give his shirt to the 18-year-old.

However, Sportsmail can reveal the reason Neymar declined to give his shirt to the teenager is because he had already committed the jersey to the Marina Dalglish Appeal.

Neymar (right) and Anthony Ralston had a heated dispute during their encounter on Tuesday

Neymar had been criticised for appearing not to swap shirts with Ralston at full-time

However, Sportsmail understands it was because he had already agreed to give it to charity

The Paris Saint-Germain star exchanges words with the Celtic defender after the match

The pair had to be separated by Marco Verratti and Edinson Cavani as things got tetchy

The charity - set up by the Dalglish family in 2005 - focuses on helping those diagnosed with breast cancer.

Celtic and Liverpool legend Kenny Dalglish played an integral role in establishing the charity with wife Marina. The shirt will be used to raise money at a forthcoming event.

Neymar, the most expensive player in football history, and Ralston were involved in a heated confrontation during PSG's 5-0 win at Parkhead on Tuesday night, the Celtic defender laughing in the Brazilian's face at one point.

The former Barcelona man had been accused of not handing over his top to Ralston because of the clash.

But the South American was merely sticking to his agreement with the charity.

Ralston laughs in the face of Neymar during Paris Saint-Germain's 5-0 win at Parkhead

Ralston went in strongly on Neymar a couple of times before the incident on Tuesday night