Just hours after a report emerged that Mourinho would be sacked regardless of United's result against Newcastle, his team were rocked at Old Trafford as they conceded two goals in the opening 10 minutes.
"He has chosen to take a sabbatical year", Migliaccio said.
"I do not think that he will manage in England", Migliaccio told Le Journal du Dimanche (via Goal). Nobody has done more to undermine, expose or demotivate this United squad than Mourinho himself.
Zidane has been out of a job since leaving Real Madrid at the start of the season.
"We have some kind of situation with Man United".
Look down United's squad list and there is damage everywhere.
Alexis Sanchez came off the bench to save his side's blushes and secure a 3-2 win against Rafael Benitez's embattled Magpies, who had held a two-goal half-time lead through early Kenedy and Yoshinori Muto efforts.
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Meanwhile, United executive vice-chairman Ed Woodward is "loathe to axe Mourinho" because it would mean a third sacking at the club since Alex Ferguson retired in 2013, and of course there's also the question of money.
The Red Devils piled-up the pressure after the break, and Juan Mata swept home a world-class free-kick with 20 minutes left.
Anthony Martial, at odds with the Portuguese this season, scored the equaliser and Sanchez, left out of the squad against West Ham last week, headed a 90th-minute victor. "I don't want that, and if I could tell them to not do it I would, because it is not about me it is about the football club they love and the football club we represent with honour and dignity".
But is the victory short-term balm or a turning point in United's season?
"It was special", attacking midfielder Mata said.
It came 11 days after the United boss admitted he "knew we were in trouble" when Bailly and Phil Jones were next up in the penalty shootout against Derby.
"I am very happy for the team, for us, but especially for the fans because they don't deserve everything that is going on, so they deserve to see a team like today". One wonders what his reaction would have been had United lost.