Sarri on way out
captain John Terry was at the 2-0 defeat to United but there has been no move to ask the Aston Villa coach to come in as caretaker, or to just help out in the dressing room.
Intermediaries also believe the Blues job is not currently that attractive to high-profile managers like Zinedine Zidane, while Laurent Blanc has few admirers at board level.
Former Blues midfielder Frank Lampard would find an approach from his old club hard to turn down but he is focused on his job at Derby.
Although No.2 Gianfranco Zola would be an obvious choice as caretaker were Sarri to go, some at Chelsea feel he is part of the problem.
Adding to the sense of crisis, Chelsea could also be hit with a transfer embargo over allegations of rule-breaking related to the signing of foreign players under 18.
And there is the future of absent owner Roman Abramovich, with club sources unable to confirm whether he will be at Wembley for Sunday’s final.
Abramovich did not attend training yesterday, rarely speaks to Sarri, and has not been seen at matches all season amid rumours he could be prepared to sell up.
Winger Pedro said: “The most important thing now is to stay calm, train really hard and recover our best football and our best feeling, because if not we are in trouble.”
Chelsea are still waiting to hear if Eden Hazard will sign a new contract or push for a move to Real Madrid.