The defenders say the Jamaican sprinter would be a good addition to the squad, and hinted that their positions could be under threat if Sir Alex did sign him up
Bolt has previously spoken of his desire to play for United, while Sir Alex has said the sprinter who won gold in the 100m and 200m at the London 2012 Olympics could feature in a charity match next year.
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Evra and Vidic were both in jovial moods as they laughed about the Jamaican competing for each other's positions.
"With his pace I think he would be good at left back," Vidic joked on YouTube.
Evra then hit back saying that the 26-year-old would be more suited to Vidic's position: "He's a tall guy, I think more of a centre back."
The full-back also had words of warning for striker Javier Hernandez, saying Bolt could be deployed as a striker: "He can play as a striker as well, long ball, he can go behind the defender, why not?"
The France international also joked that Bolt would have to share his Olympic medals with him.
Evra said: "He can play, just as long as he gives me all of his trophies."