Argentina scored two goals in extra time to triumph 3-1 over Switzerland in Kansas city.
The two teams had tied 1-1 in 90 minutes before Argentina added two goals in extra time.
Argentina went ahead in the 10th minute after Alexis Mac Allister headed from a Lionel Messi corner.
Nortingham Forest forward Dan Assane Ndoye equalised for Switzerland in the 67th minute after a brilliant one two pass from Real Betis Defender.
Julian Alvarez scored after curling a 25 yard unstoppable shot past Swiss Keeper Gregor Kobel.
The Swiss had to finish the game with 10 men after Star Stricker Breel Embolo was controversially given a second yellow card for diving in the box following a VAR review.
The Swiss were caught on the counter attack and Lisandro Martinez was able to finish brilliantly to end off the game.
Argentina will face England in the second semi final on Wednesday July 15 in Atlanta.
Edited by John Majau
