Arsenal are finally beginning to be talked about as genuine contenders again after failing to win a trophy since 2005.
Pole Szczesny said: "I wouldn't say we have proved everyone wrong and passed all the tests.
"I will say that when we get our hands on a trophy in May.
"What is important is what we believe in and we believe that we are good enough, with the players we have got and the work we are doing, to win the Premier League."
He added: "We know that if we just carry on doing the same things, we will show people that this team and these players are good enough to win a trophy without any extra additions or extra work. We believe we can do it."
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