Second on the list is the USA's 1-0 win against England in 1950. See the compilation at the bottom of the article.
For favorites Argentina (only Brazil was ranked higher going into the tournament), it was a loss of epic proportions.
One who felt particularly bad was superstar Lionel Messi, 35, who received poor support.
Everything was too focused on what Messi was going to do.
The teammates became passive.
- Shall I tell the truth?
I feel dead.
It is a very hard blow because we did not expect to start the tournament in this way.
As a group, we have never experienced anything like this, says Messi according to AP.
On SVT Play, he could be followed with a camera.
- In five minutes we made mistakes and ended up in a 1-2 deficit and then it became really tough and we lost our organization and staggered with the ball, says Messi, who was not surprised by the Saudis' capacity.
- We knew what their capacity was if we were to give them space.
They didn't surprise us, we knew they could do it, says Messi who is determined for the continuation where only victories against Mexico and Poland count.
Do not let the people of Argentina down
- The people (in Argentina) have to trust that we will not let them down and that we will show it in the next two games, says the Paris SG player.
Before the tournament, third-ranked Argentina had gone 38 games without a loss, a streak stretching back three years.
In the last 15 matches, they had kept a clean sheet in 13.
51st-ranked Saudi Arabia, the second-worst team on paper in the tournament, had won just three games in the World Cup play-offs they fielded in before today's historic ruckus.
- It is a victory for the history books.
All the stars aligned for us.
This victory will last forever.
This is football and it sometimes gets completely crazy, says Saudi Arabia's French national team captain Hervé Renard.
For Argentina, the conditions have changed completely with two games left in the group stage.
- We will play two finals now.
It went to hell in the second half, says Lautaro Martinez.