Great Britain will be represented in the Australian Open finals - whatever the outcome of Andy Murray's clash with Novak Djokovic.
The junior pairing of Liam Broady and Joshua Ward-Hibbert qualified for the boys' doubles final with a narrow win on Thursday.
The sixth seeds toppled the fourth-ranked Australian duo of Andrew Harris and Nick Kyrgios.
The Britons fought back from a set down to force a champions tie-break decider, eventually winning the match 4-6 6-4 10-6
Broady, last year's runner-up in the Wimbledon boys' singles, and Ward-Hibbert will face the unseeded Czech-Croat pairing of Adam Pavlasek and Filip Veger in Friday's final.
Earlier there was disappointment for Ward-Hibbert and compatriot Kyle Edmund in the quarter-finals of the boys' singles.
Ward-Hibbert was beaten 6-3 6-2 by Filip Peliwo, of Canada, while Edmund lost 7-5 7-5 to Australian top seed Luke Saville, the reigning Junior Wimbledon champion.