Defending champion Li Na and Peng Shuai defeated their respective opponents Friday to set up an all-Chinese final at the Shenzhen Open.

Top-seeded Li thrashed Germany's Annika Beck 6-1, 6-3, while fifth-seeded Peng advanced after American Vania King withdrew with a right thigh injury.

"It'll be a tough match tomorrow, as we're quite familiar with each other," said Li. "We both have improved a lot over the last year. I'm quite looking forward to the final."

King said she began feeling pain in her leg during her win over second-seeded Sara Errani in the second round and pulled out to rest before the Australian Open, which begins on Jan. 13.

"It was a really difficult decision for me to pull out because I hate losing and not competing," King said. "But I just have to look out for my health."