The Fortnite craze continues to infiltrate pro sports ... this time, it's Atletico Madrid star Antoine Griezmann busting out the "Take The L" dance after scoring a goal in the Europa League final.

Griezmann's goal gave Madrid a 1-0 lead over Olympique de Marseille in the first half ... and he was pretty fired up about it.

The 27-year-old is a pretty huge gamer -- he's always posting Fortnite videos on Instagram and has actually used the celebratory dance move in a game before ... but not in a game this big.

Just last week, boxer Teofimo Lopez used the same Fortnite dance to celebrate after knocking out his opponent ... and added a backflip for good measure.