Ex-Manchester United star Phil Neville has come to the defence of Jose Mourinho, claiming that criticism of the Portuguese manager is becoming "personal".
Mourinho remains under intense pressure at United following a poor start to the Premier League season and public fall-outs with key players.
"The organisation and determination of the players was really good and it's a pity that at the end against a very good team you concede the first goal that changes everything, and they continued pushing and it was hard to defend".
"The manager can do so much but then it is down to the players on the pitch to produce, and probably collectively".
When it was put to the United manager that this kind of run for a club of this size is not acceptable, he said: "Yes, I accept (it is not good enough)".
The FA have launched an investigation after Jose Mourinho appeared to mouth obscenities into a television camera following Manchester United's comeback win over Newcastle on Saturday.
"And I'm furious that we're stood here thinking that there's a report that's broken out...journalists don't break stories of this nature unless they're absolutely certain. But the one thing that happens at Old Trafford is the crowd gets right behind you, and is always supportive of the manager and the players".
Mourinho has signed two centre backs for a combined fee of 61 million euros since arriving at Manchester United in 2016, but both Eric Bailly and Victor Lindelof have struggled to perform on a consistent basis for the club.
The 32-year-old believes the current situation at United is similar to Louis van Gaal's two-year reign at the club.
"Personally I think he set us up brilliantly, but we didn't produce on the pitch".
Romelu Lukaku described Alexis Sanchez as one of the hardest-working players he has seen after watching him score the winning goal for Manchester United against Newcastle United on Saturday.