He said: "What I understand now – and this is the most difficult part of all here – is that everything I do is analysed, if I make a substitution, how we play, formation, everything.

"I understand one thing: our performances against Brighton and against Tottenham were nowhere near what we are capable of.

"I accept I get criticism for that, but it's the constant, 'He doesn't know what he is doing, why has he picked this team, this is the way forward, we should be playing like this', blah blah blah. That's the difficulty.

"If you play like we did against Spurs and particularly against Brighton at home, then you're going to come in for criticism and you have to accept that.

"It's a big club, with big expectations and the criticism falls upon you. I have to be big enough to accept it and we didn't play well enough. The analysis of everything you do, that's the difficulty."

Newcastle shook off the Brighton loss by winning 7-0 at League Two Morecambe three days later and while Bruce may hope for an equally smooth passage to the quarter-finals at Rodney Parade, he knows that is unlikely.

He said: "No disrespect to Morecambe, but they (Newport) are a far better side. They've had joy in the cup, they're doing well in the league. It's a difficult place to go and play, as many people have found."

A place in the last eight, albeit via a friendly series of draws, would provide a welcome boost on Tyneside, but that would not be enough for Geordie Bruce.

He said: "I don't really look at that as an achievement. I think an achievement would be getting to a final and then ultimately if you win it, then maybe that's an achievement."