Martinez made a crucial, spectacular save from Randal Kolo Muani in the closing seconds of extra time.
And he made himself a hero to his fellow countrymen during the shootout, psyching out Kingsley Coman and Aurelien Tchouameni as his side won 4-2 on penalties.
But his antics after the win have attracted some negative attention, with fans labelling him a bad winner judging by his public behaviour.
The Aston Villa goalkeeper was booked for unsportsmanlike conduct for throwing the ball away before Tchouameni’s spot kick, but couldn’t care a jot after getting his hands on the trophy.
Argentina stars took part in wild dressing room celebrations after the match, with footage captured by Sergio Aguero among others.
In one clip, Martinez and Co are claimed to have jokingly demanded a moment’s silence while taking part in a Conga with his pals.
The stopper and his teammates sang in Spanish: “A minute of silence.”
Martinez shushed his pals before continuing: “For Mbappe who is dead!”
The victorious Argentina stars then continued dancing and singing.
Amid the celebrations, one star was caught on camera sensationally somersaulting into a bin.
Much more singing and dancing followed, with tournament sponsors Budweiser leaving plenty of bottles of beer out for the squad.
Lionel Messi then sensationally returned to the dressing room clutching the World Cup itself, clambering up onto the table and jumping up and down on it.
Boss Lionel Scaloni then arrived donning a retro Argentina shirt, and was promptly drenched by his players.
Fireworks cracked, car horns sounded and fans draped in the national blue and white colours paraded the streets of Argentina after the win.
Aerial vision from Buenos Aires showed the insane number of people that gathered to celebrate the national side’s victory
Video footage from 30,000 feet showed fans being told the result and celebrating on board a flight from Buenos Aires to Madrid.
