Spanish world number one Rafael Nadal earned his country a meeting with Serbia in tomorrow's final of the inaugural Association of Tennis Professionals Cup, as his singles victory over Alex De Minaur established a decisive 2-0 lead over host nation Australia.
Nadal, 33, who suffered defeat in his quarter-finals singles match before helping to earn victory over Belgium in the deciding doubles, lost the first set 6-4 to his world-ranked 18th opponent - who has joint Australian and Spanish citizenship.
But in front of a passionate crowd at Sydney's Ken Rosewall Arena, he clawed his way back to win the second set 7-5, before taking the third 6-1.
Roberto Bautista Agut, world-ranked 10th, won the opening singles match against mercurial home talent Nick Kyrgios 6-1, 6-4.
Serbia, who had beaten Canada 3-0 in the quarter-finals, moved through to the final with similar ease, as they defeated Russia by the same scoreline.
Dušan Lajović set the win up with victory in his opening singles match against Karen Kachenov, 7-5, 7-6 (7-1).
Djokovic, the world number two, then secured a spot in the final with a hard-fought 6-1, 5-7, 6-4 win over world number five Daniil Medvedev.
Nikola Čačić and Viktor Troicki rounded the match off by defeating Teymuraz Gabashvili and Konstantin Kravchuk 6-4, 7-6 (9-7).