Roy Keane has demanded Manchester United "draw the line" and has given Ole Gunnar Solskjaer one game to save his job.
The Red Devils were beaten 2-0 by local rivals City in the Manchester Derby on Saturday, although the margin could well have been wider.
United were a goal down within seven minutes as a result of Eric Bailly 's own goal before Bernardo Silva struck in added-time in the first half.
Pep Guardiola and co eventually strolled to victory as boos rang out around Old Trafford on Saturday afternoon.
Man Utd 0-2 Man City : 5 talking points as derby defeat piles pressure on Solskjaer
Keane, on punditry duty for Sky Sports , laid into his former side post-match and says Solskjaer must "get a result" when the Red Devils travel to Watford after the international break.
"You have to draw the line now. It’s not quite happening," the ex-United captain stated.
"Ole is a brilliant guy and an honest guy but management is about survival and he's got to get a result in the next game.
"A coach or a manager can’t give a player courage. I have to remind myself it’s hard out there but they shouldn't be 11 points behind [league leaders] Chelsea."
Have Your Say! Is time up for Solskjaer at Old Trafford? Let us know in the comments section
Solskjaer's men have now suffered back-to-back home defeats to their bitter rivals and could be 10th in the Premier League table by Saturday evening if results go against them.
Despite Liverpool winning 5-0 at Old Trafford a fortnight ago, Keane believes his former team-mate will be under more pressure this time around.
"I think Ole will be under more pressure than the Liverpool game," the Irishman lamented. "The way they lost, it’s a derby game.
"Ole was shook up in that interview, it’s tough for a manager when you’ve got beat in a match and he’s getting asked hard questions but he’s steps up and he always has and I’ll give him that.
"But if you’re a manager, this morning he spoke about the players being in a good mood in the hotel whatever the hell they were doing, you’re going into a match looking at the bus and [Luke] Shaw, [Harry] Maguire, Fred and your job is depending on these guys?
"You’re in trouble. You've got international players. Anyone who tells me Fred is good enough for United - they’re in cuckoo cuckoo land.
Is Solskjaer the right man to take Man Utd forward?
Opinion : 'Solskjaer waved white flag as Man Utd turned in latest sackable performance'
"Cavani is 30-odd you can't hang your hat on him every week. I can imagine Ole looking at players and not knowing what you’re going to get.
" Micah [Richards] will enjoy their day and they all have their little day, Liverpool one title in 30 years. Man United are in a bad place, but there’s a way out.
"Is Ole the man to do it? Huge question marks.
"I hope [he is] but it’s more hope than belief."
