Andy Ruiz Jr's INCREDIBLE Body Transformation SHOCKS Fans.. Welcome back to Fitness Craze. Here’s some news for you about Andy Ruiz Jr. Andy Ruiz Jr has wowed boxing fans with his incredible body transformation ahead of his upcoming fight with Luis Ortiz. Ruiz Jr stunned the world with a shock victory over Anthony Joshua in 2019 to become heavyweight world champion. He piled on weight after his surprise victory at Madison Square Garden and would go on to lose to Joshua in a rematch in Saudi Arabia later that year. The 32-year-old Mexican-American next faces Ortiz in Los Angeles on Sunday as he looks to work his way back in contention for another world title shot. Ahead of the fight, 'The Destroyer' shared a behind-the-scenes promotional video of himself which has stunned fans. In the clip, Ruiz Jr can be seen flexing his upper body and appears to have put on a significant amount of muscle. He even looks to have a six-pack, with fans on social media blown away by his appearance. "Best shape I've seen you in! Motivating myself on my health journey! Crush it," wrote one fan on Twitter. Another added: "Best shape I've seen Ruiz in." While a third wrote: "Ruiz in that shape is a handful for any heavyweight imo." His opponent Ortiz, 44, heads into the fight on the back of a sixth-round TKO victory over former IBF heavyweight world champion Charles Martin earlier this year. But he has fought just twice since losing to former WBC champion Deontay Wilder in 2019, with his only other bout ending with a victory against Alexander Flores in 2020. Speaking earlier this week, Ruiz Jr said he expected his clash with Ortiz to be one of the most physical fights of his career. In related news, Boxing fans have been left stunned by Hafþór 'Thor' Björnsson's transformation ahead of his long-awaited fight with Eddie Hall after he shared new sparring footage. The former strongman is set to go toe to toe with the British champion in Dubai later this month. And much has been made of both men's dedication, with Thor going from eating 10,000 calories a day to just 4,000, losing over 50kg in the process. #AndyRuizJr #BodyTransformation #SixPack Related Videos: ANDY RUIZ NEW 6-PACK ABS PHYSIQUE FIRST LOOK; IN PHENOMENAL SHAPE FOR LUIS ORTIZ SHOWDOWN • ANDY RUIZ NEW 6-PACK ABS PHYSIQUE FIRST LO... ANDY RUIZ JR BODY TRANSFORMATION ANDY RUIZ GOTS PACK ON HIS STOMACH • Shorts Andy Ruiz Jr body transformation • Andy Ruiz Jr body transformation