Anthony Joshua took on undefeated Ukrainian boxer Oleksandr Usyk at the Tottenham Hotspur Stadium in London, England, on September 25.
It was Joshua's second consecutive title defense. Meanwhile, it was only Usyk's third fight at heavyweight. A former cruiserweight, Usyk weighed in at 221 pounds, much lighter than his 240-pound British opponent.
Usyk shocked the world by beating Anthony Joshua via a unanimous decision. In doing so, he became the new WBA (super), IBF, WBO and IBO heavyweight champion.
He stepped on the gas from the get-go, troubling AJ with his movement and crisp striking. While Joshua deserves a lot of credit for hanging on until the end despite getting tagged repeatedly, Usyk put on a masterclass.
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The main event turned out to be everything it promised to be and more. Both men went to war inside the squared circle. The back-and-forth thriller, which went the distance, is definitely a Fight of the Year contender.
Despite heading into the fight as an overwhelming underdog, Usyk gave Anthony Joshua one of the toughest fights of his career.
Catch some of Twitter's reactions to the main event fight below:
Lawrence Okolie defended his WBO cruiserweight title against Dilan Prasovic in the co-main event. Okolie was the favorite heading into the fight and he showed why inside the ring.
The British fighter scored a big knockdown in the second round with an overhand right. He then finished the job in the third frame with a vicious body shot that rendered Prasovic unable to continue any further.
Campbell Hatton, son of former British champion Ricky Hatton, escaped with a somewhat surprising unanimous decision win against Sonny Martinez.
While Hatton deserves credit for staying in the fight until the end despite facing heavy adversity, Martinez clearly landed the meatier strikes. That's why, when the judges unanimously scored the fight 58-57 in favor of Hatton, quite a few eyebrows were raised.
Callum Smith shocked the world in his light-heavyweight debut by violently knocking out Lenin Castillo in the second round of their fight.
A nasty right hand was all it took for Smith to put Castillo away. The strike sent the Dominican crashing to the canvas. He had to be stretchered out of the ring following the scary KO.
Check out the vicious knockout below:
Anthony Joshua vs. Oleksandr Usyk: Full results
Oleksandr Usyk def. Anthony Joshua via unanimous decision (117-112, 116-112, 115-113)
Lawrence Okolie def. Dilan Prasovic (third-round KO)
Campbell Hatton def. Sonny Martinez via unanimous decision (58-57 x3)
Callum Smith def. Lenin Castillo (second-round KO)
Florian Marku def. Maxim Prodan via split decision (96-94, 97-93, 91-99)
Christopher Ousley def. Khasan Baysangurov via split decision (95-95, 97-94, 97-94)
Daniel Lapin def. Pawel Martyniuk via referee decision (60-55)