Argentina · Open Knockout
Copa Argentina
In US-sports termsArgentina's open knockout — single elimination at neutral grounds, where a fourth-tier club really can knock out Boca on any given night.
What it is
Argentina's national cup — a huge single-elimination bracket mixing top-flight giants with lower-league and regional clubs, mostly at neutral venues.
How you get in
Qualify through your division — entries span the whole pyramid.
What it feeds
Winner → Copa Libertadores. For smaller clubs it's the realistic route to the continent.
Neutral venues strip away home advantage, which is exactly why the giant-killings keep coming.