"In this match I didn't lose my concentration, I always stayed focused on the match and be got myself in every rally early," Chang said.
Early on, the unseeded Chang struggled to make an impression on Erakovic's serve, but when an opportunity eventually presented itself she pounced, breaking twice in three games to take the opening set. She repeated the trick in the second set to wrap up victory in little over an hour.
"I am not under any pressure right now, I just want to enjoy the game and seize the moment to play in front of my country people," she added.
Rodina, who had taken the first set 6-2 when a back injury forced Olga Govortsova to retire from their semifinal, was equally keen to downplay the pressure ahead of Sunday's final - her first outside the ITF Circuit.
"I tried to focus on my match, because I could see she was having some problems," Rodina said. "We will see what happens tomorrow. I will try and relax [for the final]. We haven't played before, but I saw some of her match today and she was playing pretty well."