Saudi Arabia’s win over Argentina at 18-1 odds was the biggest upset in World Cup history. Here’s proof

The biggest upset EVER.

Saudi Arabia’s win over Argentina early Tuesday morning isn’t just one of the biggest upsets in World Cup history, it might actually be the biggest.

That’s according to several sportsbooks, many of whom had Saudi Arabia’s odds to win the match at 18-1 or longer.

To demonstrate just how big of an upset it was, Argentina entered the World Cup on a 36-match unbeaten streak, one short of tying the longest streak in men’s international soccer history. At BetMGM, they had the second-shortest odds to win the World Cup at +550. Even after the loss, their odds are tied for fourth-shortest at +850.

Saudi Arabia’s odds were at the very bottom of the 32-team field and remain in the bottom five even after the massive upset. Their odds to beat Argentina were 18-1 at BetMGM.

Those odds grew to 125-1 at PointsBet once Lionel Messi’s penalty kick put Argentina ahead 1-0.

A bet for $100 on Saudi Arabia at that point would have won $12,500.

But I’m no soccer historian. If those numbers aren’t enough to convince you this was the biggest upset in World Cup history, others made the argument too.