The Aussie will look to win the biggest title of her career against Wang Qiang, who moved into the semifinals as an alternatre when Azaela Group winner Madison Keys withdrew due to a knee injury, and made the most of her second chance with a 6-2, 6-0 win over Garbiñe Muguruza.
The Aussie No.1 scored a straight-sets victory over Wang this year at the Internationaux de Strasbourg prior to the Fench Open.
"I have only played Q on a clay court. I think in both of those matches, it's kind of a fresh slate. We can go into it. Nothing really changes for me. I go out and try to play the same way," Barty said.
"There are some tactical changes that we try to implement and different things that we try and expose from their side. But in the same breath, I get to go out there, and it's one match and then I get to go home and relax. Leave it all out there and do the best that I can and whatever happens, happens."