Underdog victories at the World Cup: what were the biggest and best upsets?

According to Guardian Football:

We’ve looked at data from USA 1994 onwards to see how and when classic upsets take place – and what that could mean for this year’s competitionThis year, the biggest ever World Cup will feature 48 teams, an increase from 32, opening up the tournament to even more upsets, shocks and surprises. The vagaries of the World Cup draw have given rise to classic underdog victories over the years, from an amateur USA team’s shock defeat of the then-favourites England in 1950 onwards. But what does the data tell us about upsets in football’s modern era?Starting from the launch of the Fifa men’s world ran

(Source: Guardian Football)