The Brazilian right-back is currently in the final year of his deal at the Camp Nou and looks unlikely to stay on, with the Spaniards understood to be ready to let him leave.
Chelsea and Liverpool have been strongly linked with the 31-year-old, however reports now indicate that United could well have a deal all but sewn up.
Alves’ representative has recently claimed that his client won’t make a decision until January, however respected FIFA agent Francois Gallardo has revealed that a deal to take the South American to Old Trafford is in place:
“The player will leave Barcelona next season. He has signed a preliminary agreement with Manchester United.”
Alves is though to be a short-term replacement for compatriot Rafael, who has not impressed Louis van Gaal with his inconsistent showings so far this term.
The attack-minded Samba star has won multiple La Liga titles and the Champions League during his spell with Barca.