PSG boss Luis Enrique appeared to hit Joao Pedro in Club World Cup full-time chaos.
Chelsea stunned the European champions to win the first edition of the newly-revamped tournament 3-0 in a brilliant performance by Enzo Maresca's team.
Tempers had flared during the match, even seeing Joao Neves sent off for pulling Marc Cucurella's hair following a VAR review after the incident was initially missed, but it all boiled over as multiple flash points kicked off after the full-time whistle.
While the Blues players celebrated, Pedro was confronted by Gianluigi Donnarumma and Luis Enrique - pushing away the PSG manager.
The Spaniard was left furious and went to grab Pedro's face twice. The second time turning into a slap and sending the Brazilian tumbling to the turf.
Enrique was dragged away by security and injured PSG defender Presnel Kimpembe while Enzo Maresca was soon seen talking to Donnarumma.
The incident was one of many flash points sparked at full-time with both sets of players and coaching staff attempting to get at each other.
Chelsea players were eventually ushered away by Maresca to go and celebrate the victory with their fans before heading up to the platform to lift the trophy.
The Blues were inspired to the £93million victory at the MetLife Stadium in New York by Cole Palmer. The England star scored the opening two goals before assisting Pedro's chipped finish for the third as Chelsea led 3-0 at half-time.
Just days ago Pedro was on a beach on holiday somewhere as a Brighton player while Chelsea needed extra-time to get past Benfica in the round of 16. But Chelsea's latest £60m summer signing now has three goals to his name already after scoring a brace to beat Fluminense in the semi-final.
Chelsea are back in action on August 8 against Bayer Leverkusen before starting their Premier League campaign against Crystal Palace nine days later as Maresca's team look to kick on from their success.