The 17-year-old Londoner produced an impressive victory over Germany’s Ella Seidel in the last 16 by winning in three sets, 6-2, 3-6, 6-4.
Ranah – who has now represented Great Britain at a number of Grand Slam Junior events – will face Poland’s Weronika Ewald for a place in the semi-finals tomorrow (26 January, match start 01:00GMT).
In the last major championships of 2022, The US Open, Stoiber also made the quarter-finals before a narrow defeat to number seven seed, Diana Shnaider.
The Australian Open is the first Grand Slam of the calendar year and will end on Sunday 29 January 2023.
For more information on the LUNTA, visit its dedicated website here: /sport/sports/tennis/national-tennis-academy/