Pato is Argentina's unique official national sport. Originally played with a live duck inside a basket (pato means duck in Spanish), the modern sport, a little like a cross between polo and basketball, is more animal-friendly and is played using a specially made ball with six handles.
After almost 40 years, one team has made history this year, Las Heras-Los Baguales Agropharma having reached the 40 points needed to be considered perfect in the sport as they reach the final of this, the 76th national final.
The team will take on El Relincho, winners of this year's El Recuerdo Cup from Rawson, on pitch N°2 at the Argentine Polo Ground, from 4.00pm on Saturday.
On one side, the perfect team seeking to seal its legacy with a major title; on the other, a team with 35 points hot from a spell of recent triumphs. The clash is guaranteed to be spectacular.
What do you need to know before you watch a match? Here's a review of some of the basics.