Anthony Joshua vs Andy Ruiz
Anthony Joshua loses his US debut, in a shocking upset which is even compared to James Buster Douglas beating Mike Tyson, underdog, Andy Ruiz Jr, stops Joshua. Ruiz fights on 5-6 weeks notice, replacing Jarrell Miller (who failed 3 drug tests and lost his opportunity).
Andy Ruiz Jr became the first Mexican heavyweight world champion in the history of boxing.
Joshua put Ruiz down in round 3, but Ruiz came back to drop Joshua twice in the same round, in a strong candidate for Round of the Year.
Ruiz dropped Joshua twice in round 7, Joshua beat the count both times, but the referee wisely called a halt to the fight after Joshua got up from being dropped for the 4th time in the fight.
After 6 rounds, Ruiz was very slightly ahead, the fight was very close on the cards, the judges were split, one judge had Joshua ahead 57-56, but the other two had Ruiz ahead by the same score.