The save drew high praise from manager Arsene Wenger, but Szczesny played down his contribution towards the win.
"I don't think it was a great save," he said.
"I am not getting too excited, it's about the team's defending.
"It's not just the two centre-backs, it's not just the goalkeeper, it's the whole team. A lot of credit has to go to (Arsenal assistant) Steve Bould for his work."