The Taeguk Warriors haven't beaten Iran in Tehran in seven previous meetings, with two draws and five losses.
Paulo Bento's side hosts the Syrians on October 7 before travelling to Tehran to meet Group A leader Iran five days later at the Azadi Stadium.
“What we should do is to focus on our way of playing and respect the opponents, and try to improve certain aspects that we didn't do so well in some moments of earlier games,” Bento said.
“We'll try to improve our way of attacking the opponents, create more chances to score than in the first two games, and keep within the same behavior in the defensive process,” the Portuguese added.