Szczesny is determined to put the record straight when Manchester United visit the Emirates.
The Pole told the Daily Mirror: "We represent one of the biggest clubs in the world and what we did early on is not acceptable.
"We said that at half-time, we went out in the second half with a different attitude and it was much more of an even game.
"But as I said, we will learn our lesson from this and respond quickly against Man United."
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