Upset is one reason why sports are fascinating—defying the odds, proving the doubters wrong, and many more.
In boxing, fans inside the arena will always be in awe whenever upset takes place.
We listed the biggest upsets in boxing! Let\’s take a look.

EVANDER HOLYFIELD VS MIKE TYSON
Although both are hall of Famer, Holyfield came to the fight as an underdog. But he proved that he is better after he knocked out Iron Mike in the 11th round. Holyfield bullied the “worst man on the planet.\” And that is something to brag about on his behavior.
The fight took place on November 9, 1996. Holyfield became a three-time world heavyweight champion after defeating Tyson.
GEORGE FOREMAN VS MICHAEL MOORER
This one is extraordinary. Although if we\’re looking at the names, Foreman has the upper hand. However, he fought Moorer at the age of 45. All Foreman needed was one punch despite being at a disadvantage in all nine rounds. In the 10th, he ended Moorer and whole. WHAT. AN. UPSET.
BUSTER DOUGLAS VS MIKE TYSON
It will be the second time Tyson is on the upset list. Well, he is that great, that\’s why.
Douglas is much more underdog compared to when Holyfield fought Tyson. However, Douglas had extra motivation. His mother died weeks before the fight. The rage in his heart was poured on the champ. It was too much to handle for Tyson as he dropped out in the 10th round. Douglas became the undisputed heavyweight champion.
ANDY RUIZ JR VS ANTHONY JOSHUA
In recent years, this is one of the biggest upset. And it will be one in the books. Ruiz was the challenger against the unified heavyweight champion Joshua who only took one shot at the temple to change Ruiz\’s boxing career completely. A massive punch put Joshua\’s feet it unstableness. He never regained his balance; thus, Ruiz took advantage. The KO put Ruiz in deep tears. He was sprouted into stardom after the fight.