Having seen England up close, Szczesny believes that there is enough quality within Roy Hodgson's squad for them to be considered among the contenders to "go all the way".
"They can go all the way. I thought offensively England were fantastic," he told reporters. "England are also solid in defence now, so if they keep going like that and can improve a bit more, then surely they will have a chance at the World Cup.
"If they can go to Brazil with the same attitude which beat us, then they will be one of the favourites, and I think they believe they are. I hope they can do very well. They created a lot of chances, which was probably good for me as it meant I could make a couple of good saves, but I am obviously very disappointed about the result."
The Poles could only finish fourth in the standings behind England, Ukraine and Montenegro.