Britain’s Anthony Joshua was shocked on his US debut by Andy Ruiz Jnr in front of a packed crowd at Madison Square Garden as the American fighter claimed the IBF, WBA and WBO World Heavyweight titles. The Englishman was expected to stroll to victory against the Mexican-American fighter but things did not go to plan. The upset has even been described as the biggest in the history of the sport, even more than Buster Douglas beating Mike Tyson in 1989. It was an even fight in the first two rounds before exploding in the third. Andy F—ING RUIZ JR. #JoshuaRuiz pic.twitter.com/bjjNhWlbTD — DAZN USA (@DAZN_USA) 2 June 2019 <!--//--><![CDATA[// ><!--\n\n\n//--><!]]> Joshua dropped Ruiz, who is known as “The Destroyer”, but the British boxer was then sent to the canvas twice himself. He had only been dropped once before in his 23 fight career. This also marks his first defeat as a professional. After a calmer fourth round, Ruiz sent Joshua to the floor twice more in the seventh and the referee stopped the fight. Ruiz becomes the first fighter of Mexican descent to be heavyweight champion. He only agreed to the fight four weeks ago. “I just want to thank God for giving me this victory. Without him this wouldn’t have been possible,” he said afterwards. “This is what I have been dreaming about. This is what I have been working hard for, and I can’t believe I just made my dreams come true.” Andy Ruiz Jr. is the first Mexican Heavyweight Champion of the World! He's defied the odds and stopped Anthony Joshua in the 7th round! #JoshuaRuiz pic.twitter.com/jFyAfEh4pk — The Sportsman (@TheSportsman) 2 June 2019 <!--//--><![CDATA[// ><!--\n\n\n//--><!]]> Joshua was gracious in defeat. “Big respect to Andy, big, big respect,” he said. “Good fighter. Thank you, America. Thank you everyone for coming out this evening. Sorry I let my friends down, sorry I let my supporters down.” The sell-out crowd fell silent when Ruiz won. Earlier, Liverpool boxer Callum Smith knocked out Hassam N’Dam to retain the super middleweight title. Humble In Defeat Nothing but class from Anthony Joshua following #JoshuaRuiz pic.twitter.com/5cRlQru67o — DAZN USA (@DAZN_USA) 2 June 2019 <!--//--><![CDATA[// ><!--\n\n\n//--><!]]> That came on the back of a controversial win for Irish boxer Katie Taylor, who was given a points decision over Delfine Persoon.