He expressed his confidence in a chat with Arsenal.com.
“We all know that our last match in the Champions League at home to Anderlecht was disappointing,” Szczesny said, speaking ahead of the weekend. “But we must put that behind us and we’re all ready to bounce back against Dortmund and hopefully get a place in the last 16.
“Dortmund are a very good counter-attacking team. They press your midfielders very well and are quick to attack as soon as they get possession. They’ve got some great finishers as well, so going forward they are very strong.
“Last season we lost at home and won away, so we hope this season we can turn it around and get a result against them at home. We have confidence for Wednesday’s match knowing that we have recently beaten them. If we put in a good performance at home we know we can win.
“We know that we only need one point from our last two matches to qualify for the last 16, but we know that we have not made it yet. We’re playing at home in front of our fans and we’re confident that we can put in a good performance and qualify.”
The Gunners sit second in Group D after four games and only need one point from their last two matches to reach the last 16, but face a tough test against Dortmund on Wednesday before travelling to Galatasaray in December.