By Arsenal correspondent Tony Hughes

Arsene Wenger threatened to walk of his media briefing after losing his temper when asked a question about Jose Mourinho.

Wenger threatened to “stop the press conference” when quizzed about Mourinho’s jibe last week that the Arsenal manager was the only Premier League boss not under pressure.

Wenger was also frustrated today by repeated questions about his selection of David Ospina over Petr Cech for Arsenal’s midweek Champions League defeat to Olympiakos.

Asked by a Sky Sports journalist, “Was Jose Mourinho right when he says there’s only one manager not under pressure?” Wenger snapped: “Stop that story or we stop the press conference.”

Wenger has very rarely lost his cool in press conferences during his 19-year Arsenal reign. He is renowned for fronting up and answering most questions put to him but he is clearly incensed by the continual criticism of his decision to pick Ospina in midweek.

Wenger said: “Look I don’t want to come back on that. All that’s been said in the press conference. I don’t change a word of what I said.

“Looking at Ospina and Petr Cech, I think I have two world-class goals and it’s the easiest choice I have to make because I can pick any of the two and I am very comfortable.

“It’s the most difficult as well because both are two world-class players and always you have to leave one out.”

Cech-out: Arsenal's No1 goalkeeper was demoted to the bench for the Olympiakos defeat

Cech-out: Arsenal’s No1 goalkeeper was demoted to the bench for the Olympiakos defeat

Wenger insisted that he should not be questioned on his selection as there were things journalists did not know.

When asked today what he had meant, Wenger said: “Like I don’t know anything that you do in your job. You make decisions and you have more information than I have and it’s exactly the same in my job.

“You come to the game and assess. Was I right or wrong. I never criticise that. I accept your judgment of how the team played and your assessment. But I don’t have to give you all the information regarding my decisions.”

Then he was asked whether he could understand fans’ frustrations and also if he was accountable for his selection.

“I don’t understand that (fans’ reaction) at all. I make the decision I think is right for the game,” said Wenger. “I am accountable on the results of my team and the way they play football.”

Wenger also was visibly frustrated when asked who would play in goal against Manchester United.

“Have you another question?” he snarled. “We have two days training. Do not come always back with that same story. I think you lack a bit of creativity in the press at the moment and you follow a bandwagon. It’s very boring.

“I don’t go along with that. If you have an interesting question I will answer but apart from that let’s not always come back to the same story. Come to the game on Sunday and you will see who’s in the goal.

“I think you have not watched well the game on Tuesday night. To come always with the same story. You can put the goalkeeper you want in the goal. He can make a mistake and you have to accept that.

“If you watched really the game and you come to the conclusion we lost because of Ospina I question your knowledge in football.

Big rival: Arsene Wenger snapped when asked a question about Jose Mourinho

Big rival: Arsene Wenger snapped when asked a question about Jose Mourinho

“The experts have a lack a bit of creativity in their questions. They don’t analyse well. Honestly, not one came out and analysed well the game. One pundit says something on TV and all behind that repeat the same thing. It is quite boring.

“Nobody came out with numbers where the game was won or lost. It’s quite depressing to read that and hear that. But all just come to the same conclusion and haven’t watched what’s gone on on the pitch.

“We lost the game because we didn’t defend well. Yes the keeper made a mistake but we could still have won the game because of that.”