Elon Musk has boasted about challenged Russian leader Vladimir Putin to a "one on one" combat amid the ongoing Russia-Ukraine war. The challenge was put forward by the Tesla owner in 2022 when he tweeted: "I hereby challenge Vladimir Putin to single combat. Stakes are Ukraine,". Unsurprisingly, Putin did not directly respond. Now three years on, Musk took to X and brought the one on one challenge back to light as he demanded peace over a "stalemate" in Ukraine and said his Starlink system is the "backbone" of Zelenskyy's army. He penned: "I literally challenged Putin to one on one...