The responses to the tweet were mixed. Some encouraged Musk, some pointed out that the tweet was insensitive and said that there were better ways to help Ukraine, and some expressed concern for Musk's safety in the duel, saying that Putin would definitely win.
"I did manage to throw the world champion sumo wrestler, but at the cost of smashing a disc in my neck that caused me insane back pain for seven years," wrote Musk in the comments.
He also clarified that he was "absolutely serious."
Putin does not have a Twitter account, so most likely, he will never see this challenge, but if he does, Musk had better hope his neck is sturdier this time round.