Steve McClaren is the bookmakers' favourite to be the Premier League's next managerial casualty.
Newcastle are second-bottom after Saturday's 5-1 defeat to Crystal Palace at Selhurst Park.
McClaren, tasked with delivering a top-eight finish when he was appointed in the summer, says there is "no panic" at St James's Park.
The 54-year-old refused to talk about the January transfer window after the Palace game.
Find out why here.
Former Newcastle manager Alan Pardew, now in charge of Palace, was reluctant to talk about his old club after the game.
But he did forecast a difficult season for United.