The 20-year-old is poised to complete a £38million move to France in January, linking up with international team-mate Thiago Silva at the Parc des Princes.
However, it could have been a different destination for the attacking midfielder, had he not turned down the advances of Red Devils boss Sir Alex Ferguson, who was ready to smash the club's £30.75m record transfer fee, in order to bring Lucas to Old Trafford.
After impressing for Brazil at the London Olympics, the South American sensation ignored interest from Manchester United, choosing instead to put pen to paper with PSG, to become the Ligue 1 giants' most expensive signing.
All that stands in the player's way is the completion of the Brazilian domestic season, then he will fly to Europe to link up with Carlo Ancelotti's squad.
"Thiago Silva has told me a lot about the club and its facilities, and it will be nice to have him as my team-mate," Lucas said. "However, I have to admit that I do have a bit of fear about how things will pan out. I don't know how well it will go.
"I am not thinking about money, but I am more concerned with whether my next destination will be the right one.
"PSG's ambition and the presence of the other Brazilians convinced me."