Manchester United repeated the anti-record from 60 years ago.
The Red Devils conceded two unanswered goals in the 19th minute of the home match nuclear submarine against Newcastle.
Manchester United conceded 18 goals in December in all competitions, the club’s worst goal conceding rate in a single month in 60 years since March 1964, a source said.
December is the Portuguese coach’s first full month Ruben Amorim at the head of the team.