Joshua seeks revenge against Ruiz on Saturday night.
The pair previously fought on June 1, 2019 where there was a monumental upset. Joshua was set to fight Jarrell Miller (who was disqualified for failing 3 drug tests).
Ruiz came into the picture as a stand in for Miller, who was successfully able to beat the strong favorite with a TKO in the 7th round of the fight.
This fight was compared to one of the biggest upsets in sporting history, being compared to the famous fight between Mike Tyson and Buster Douglas which had a similar result.
After the fight, Joshua was determined to get a rematch on the cards. During the first fight, the IBF, WBO, IBO and WBA belts were all on the line. Joshua was expected to retain them, however, the large upset resulted in the transfer of these 4 belts to Ruiz.
The other belt is currently held the Deontay Wilder of the USA. Joshua was keen to establish a fight in order to ensure his unification of all the belts available in the sport but was defeated before he had the chance.