South (right) is close to joining Keothavong in the world's top 100
British pair Anne Keothavong and Melanie South both made it through to the second round of their respective Australian Open warm-up events.
Keothavong, celebrating a career-high world ranking of 53, shocked fifth seed Agnes Szavay of Hungary 6-3 7-5 at the Hobart International.
Qualifier South played two games against Marion Bartoli in Sydney before the Frenchwoman pulled out.
South goes on to face Denmark's eighth seed Caroline Wozniacki.
Victory would put the 22-year-old Briton - currently ranked 110th - on the verge of joining Keothavong in the world's top 100.
She has already booked her place in the main draw of the Australian Open by right.