Jon Jones came face-to-face with Adlan Amagov again – who famously knocked out the UFC legend in sparring.‘Bones’ was present at a bare-knuckle boxing show ran by the IBA in Russia, and he was given a heroic welcome.Jones has only ever been beaten once by disqualificationGETTYHe was then brought back into the ring, where he was greeted by former training partner Amagov.The pair held a friendly greeting and Jones was able to address the crowd.The American spoke about his famous sparring session with Amagov, which was first leaked by former UFC star Carlos Condit.Jones has recalled in the past that he was knocked out by a spinning leg kick from the devastating Russian, who is far lighter and competes at welterweight.And in the ring, Jones recalled exactly why he is so fearful of the veteran.He said: “Adlan’s the only man [to beat me]. A beautiful human being, brother. View Tweet: https://t.co/QxgqdZGGmQ“I just love the way that he’s so loved and beloved by his people and I’m honored to have had my time with him.”Jones hilariously snubbed a face-off with his former training partner, suggesting he was ‘done’ with taking him on.But then the pair burst into a hilarious impromptu spar in the ring, feinting and weaving in comical shots.He then threw his own playful spinning kick, a nod to the famous shot that stopped him in their sparring session years ago.But Jones was beaten in sparring by a Russian star in 2018But Amagov, who fought in the UFC and Strikeforce several years ago, was the man to do it.The 15-fight star hasn’t fought since 2016 and hung up his gloves aged 27, so any public sequel will be impossible.Jones has been beaten once on his competitive record, a disqualification defeat to Matt Hamill in 2009.But it was a contentious call, with the rules since changed following his disqualification.It was an intriguing sight to see Jones back in brief and comical fighting action.But MMA fans may want to see Jones return competitively, and could well do so in the near future.Jones may return to the UFC soon, having reversed his decision to retireGettyJones vacated his title and announced his retirement after failing to agree a deal to fight newly crowned champion Tom Aspinall.But the American heavyweight has now made an official U-turn, and is back in the drug testing pool.The 38-year-old is eyeing a return on a historic bill which is set to take place at the White House, with plans announced by Donald Trump.Albeit UFC president Dana White is currently not willing to hand Jones a place on the card, given uncertainty over his future.