Speaking to Mundo Deportivo, Szczesny said: "I don't think it's a pleasant situation. I was in the same situation with Juventus and decided to retire from football. I don't advise the same thing to Marc, because he still has a lot to contribute to football, but I think sometimes, in this job, you have to accept that some decisions hurt you.
"The club decided to sign Joan and had the opportunity to bring in a world-class talent who can play for Barca for the next 15 years. It must be frustrating for him after being such an important player for so many years, but Marc is a very intelligent guy, and I think he understands. It's not just a decision for the club's present, but also for the future.
"We spoke a lot this summer, and I think he understands. The most important thing for him now is to get back into shape, because he missed the entire last year. He's currently dealing with an old injury, so as soon as he recovers, I'm sure he still has a lot to contribute to football."