Camacho was given the chance to work with the players at United by their assistant manager Carlos Queiroz and he said: "It was a dream come true. In fact, it was more important than that.
"Manchester United is another world. The infrastructure that they have, how they work, how to train, the tranquility with which they prepare for games, the structure that supports the team, the patience they have to integrate their reinforcements, everything is fantastic.
"The chance came after I approached Carlos Queiroz. He said it would be difficult, but I sent him my resume, he liked it and spoke to Sir Alex Ferguson and soon I was accepted."
Camacho, 35, actually was part of United's coaching staff for their 1-0 win at Birmingham City: "I was next to the players, on the pitch. I spoke with Carlos Queiroz, who showed me what to look for during games. It was incredible."