Wenger is still respected in the dressing room but it is claimed he challenged his under-performing players to prove they are good enough to play for Arsenal following Thursday's demoralising defeat.
It's the second time in a week Arsenal have lost by that scoreline, having also suffered at City's hands at Wembley in the the Carabao Cup final.
The humiliating defeat left them 10 points adrift of the Champions League qualifying places, with the fourth and final spot now occupied by their bitter local rivals Tottenham Hotspur.
Arsenal squandered an early chance to get back into the match in the second half when Pierre-Emerick Aubameyang's penalty was easily saved.
"But Arsene knows better than anyone that, in football, what you have done, what you have won is the past and when you won trophies like he did in the first few years that he set the level of expectation very high".
"I feel Arsenal have gone". The lines around the pitch were painted blue ahead of kick-off in case an expected snow shower covered the field.
"It pains me to see this situation, for the man", the Arsenal legend, victor of two league titles under Wenger, said.
"You come and you want your team to do well, and when you are 3-0 down at half-time then you are not happy".
". Sometimes he is not even looking at me and he still passes the ball".
"It was combination of the weather conditions and the fact we had a big disappointment on Sunday".
Meanwhile, Guardiola added he will not allow complacency to seep into his City squad after putting themselves in such a strong position. "The way we say it is because we love Arsenal and Arsene".
"It is never easy if you are not focused against teams like Arsenal".
Both entered the last season of their contract without deals, meaning Sanchez left cheaply and Ozil earned a deal worth about £350,000 a week.