After finishing tied in the group positions, host Brazil beat Uruguay in the playoff match and obtained their first title. This was the longest match in the competition, since it was needed an extra time, which oddly consisted of four periods of 15 minutes each, and not two of 15 as is still usual nowadays.
There was no qualifying for the tournament. The participating countries were Argentina, Brazil, Chile and Uruguay. All teams competed between each other in a single group. Two points were awarded for a win, one for a draw and zero for a defeat. If there was a tie of points at the top of the standings, a playoff match would be held to determine the champion.
(*)Four extra times of 15 minutes each were played. This made the match last 150 minutes, the longest in the tournament's history.