Canada will face Spain in Sunday's ATP Cup final after fighting off defending champions Russia in a tense semi-final doubles rubber.
Denis Shapovalov and Felix Auger-Aliassime came from behind to beat Daniil Medvedev and Roman Safiullin 4-6 7-5 10-7 on Saturday.
Canada, who came into the doubles match with the scores tied at 1-1, have reached the final for the first time.
"We kept fighting," said Shapovalov.
The world number 14 won his singles match against 167th-ranked Safiullin 6-4 5-7 6-4 before world number two Medvedev levelled things with a 6-4 6-0 defeat of Auger-Aliassime, who is ranked 11th.
A Canadian break of serve late in the second set meant the doubles was decided by a tie-breaker in Sydney and Shapovalov and Auger-Aliassime maintained their momentum to claim victory.
Shapovalov added: "Felix played unbelievable in the game to break and then in the tie-break as well, just making them play so much.
"We have great team spirit, so it helped us a lot."
Great Britain were knocked out of the tournament when Canada beat Germany on Thursday.
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