The 28-year-old swapped the Amsterdam giants for Old Trafford four years ago in a £14million deal.
Blind made 141 appearances for United over that period, but only played seven Premier League matches last term for Jose Mourinho’s side.
The Holland international now looks set to head back to former club Ajax, with a deal worth an initial 16 millions euros (£14.1million) understood to have been agreed. Add-ons could see the fee rise to 21 million euros (£18.5million).
