"I am happy to be making the move up a level of course, and I will continue to do my best and improve," he told Arsenal.com. "But I want to prove myself to be better than that. If I get a chance to show I can cope in an even harder environment then I will do it.
At the age of 15 he appeared for the Legia Warsaw first-team, so in that way a move into the Arsenal Academy was a backwards step.
But Szczesny added: "Coming to a team like Arsenal is such a lovely job.
"Here you can focus on football. I love that, I love to train everyday and it is all I need from life.
"I am happy in London for the reason that I play football for the best club in the world Â I don't need anything else."