Kimiko Date-Krumm, 44, came from behind to score an upset victory over Germany's Sabine Lisicki.
Russians Ekaterina Makarova and Elena Vesnina ended the surprising run of Japanese veteran Kimiko Date-Krumm and Czech partner Barbora Zahlavova Strycova 7-5, 6-3 and will take on Martina Hingis and Flavia Pennetta in the final.
Date-Krumm, playing just days after her 43rd birthday, won 6-4, 6-4 against the 19-year-old seventh seed, her second notable scalp of recent weeks after she beat Maria Kirilenko in Seoul.
Japan's 'iron lady' rules out playing in Tokyo at the 2020 Olympics when she will be almost 50.
Top seed and defending champion Serena Williams breezed into the Wimbledon fourth round on Saturday with a 6-2, 6-0 win over Japanese 42-year-old Kimiko Date-Krumm.
Date-Krumm, the oldest woman to reach the Wimbledon last 32 in the Open Era, has made it to the third round at the All England Club for the first time since her run to the semi-finals in 1996.
Kimiko Date-Krumm set up a potential Wimbledon showdown with defending champion Serena Williams as the Japanese veteran defeated Romania's Alexandra Cadantu 6-4, 7-5 in the second round on Thursday.
Date-Krumm is the oldest player competing in the main draw at the All England Club, but age trumped youth as she crushed
The Australian swept the first nine games and drubbed 42-year-old Kimiko Date-Krumm 6-0, 6-2.
After a week of setting age-related records and becoming the media darling of this year's Australian Open, the Japanese player bid farewell to the big stage for now after losing her third-round singles match on Saturday.