The player has landed in Seville this morning after the two clubs reached an agreement over the loan deal and he is set to undergo a medical.
This is unlikely to be a mere formality seeing as how his proposed move to Valencia fell through last summer as he failed his medical due to a sore pubis.
In case there are no problems, the 24-year-old will put pen to paper this afternoon and immediately travel to Manchester to join the squad for pre-season training.
Didac Vila joined AC Milan from Espanyol in January 2010, but he went on to make just one league appearance for the Rossoneri.
After spending the 2011/2012 season on loan at Espanyol, scoring 2 goals in 37 La Liga matches, Vila missed the entire last season due to the aforementioned injury.