Radwanska will face Dominika Cibulkova, who Saturday eliminated Sorana Cirstea 6-4, 6-0, in the final Sunday night.
Radwanska had earlier beat Cibulkova 6-0, 6-0 in the Sydney Open final in January.
Tennis is a lot about mentally," said Cibulkova.
"If you will see that match, you will not believe it can be like that because I was putting pressure all the time. All the first six or seven games of that match I had game point or break point, and I just couldn't make it" Cibulkova said.
It was like something really bad was happening. I was down 6-0, 3-0 and I was only thinking about one thing just to make one game, and it didn't happen. It was really bad, she adds.