Despite that setback, the 41-year-old may not be out of work for long, as reports from Portugal suggest he is the leading candidate to take over at Benfica.
Such a move would carry significant tension, given his strong ties to their fierce rivals, Sporting Lisbon.
Amorim built a strong reputation during his time at Sporting, becoming one of Europe’s most sought-after coaches.
However, his stock declined after a difficult spell in England, where United struggled in the league and fell short in European competition, ultimately leading to his dismissal.
Meanwhile, uncertainty surrounds Benfica boss Jose Mourinho, with the club reportedly considering a change as they trail in the title race.
Journalist Luis Rocha Rodrigues believes Amorim is the ideal candidate, citing his proven success in Portuguese football and experience at top clubs.