Flick was full of praise for the 35-year-old goalkeeper, stating that his performance justified why he is currently the team’s first-choice.
"It's his job, I'll put it like that. The other 10 players defended very well against eleven, but of course he helped us a lot. It's his job. That's why, at the moment, he's number one," Flick told reporters.
The German coach also revealed that he was confident Szczesny would reach this level when he decided to bring him out of retirement as cover for Marc-Andre ter Stegen’s injury.
"When you see players who you know how they played before and you see them in training, you get a feeling. I'm not the only one who decides. I have a great staff around me and we talk a lot about the performance of the players and what they can contribute. That's how we run the team. It was clear to me that he could get here. So were the other coaches. It's not a one-man decision. I decided things, but I always want to know what others think."