Serbia will face Spain in the final of the 2020 ATP Cup in Sydney after they beat Russia and Australia on Saturday, respectively.
Serbia's Dusan Lajovic picked up a straight-sets win over Karen Khachanov before Novak Djokovic sealed their win with a three-set victory against Daniil Medvedev.
Viktor Troicki and Nikola Cacic then beat Teymuraz Gabashvili and Konstantin Kravchuk in the doubles to round out the win.
Rafael Nadal secured Spain's passage by beating Alex de Minaur after Roberto Bautista Agut saw off Nick Kyrgios.
Serbia 3-0 Russia
Dusan Lajovic bt. Karen Khachanov, 7-5, 7-6 (1)
Novak Djokovic bt. Daniil Medvedev, 6-1, 5-7, 6-4
Viktor Troicki/Nikola Cacic bt. Teymuraz Gabashvili and Konstantin Kravchuk, 6-4, 7-6 (7)
Australia 0-3 Spain
Roberto Bautista Agut bt. Nick Kyrgios, 6-1, 6-4
Rafael Nadal bt. Alex de Minaur, 4-6, 7-5, 6-1
Feliciano Lopez/Pablo Carreno Busta bt. John Peers/Chris Guccione, 6-2, 6-7 (6), 10-4
Serbia vs. Spain, 6:30 p.m. local (7:30 a.m. GMT, 2:30 a.m. ET)
There wasn't much to separate Lajovic from Khachanov in the opening rubber of the first semi-final.
Between them, there was just a single break-point opportunity in the entire match. It went to Lajovic, and he clinically converted it to take the first set.
The pair battled to a tiebreaker in the second, but the Russian could not get near his opponent once they did.
Djokovic needed just 31 minutes to take the first set against Medvedev 6-1:
The Russian had won their previous two meetings, and he fought back in the second set after being broken in the opening game to force a decider.
The world No. 2 claimed the decisive break in the third set, though, after a sensational rally:
As they were in the quarter-final against Canada, Cacic and Troicki were left with a dead rubber but made no mistake in completing the clean sweep.
Roberto Bautista Agut channelled his performance from Friday, too, as he broke Kyrgios three times on the way to a comfortable win in the opening rubber in 81 minutes.
Nadal lost his singles rubber in the quarter-final, and he had to come from behind against an inspired De Minaur on Saturday.
The Australian deservedly took the first set after breaking Nadal in the opening game, playing some superb tennis along the way:
The world No. 1 did not even manage a break point until the end of the second set, but it was also set point, and he duly converted it to force a third.
From there, the Spaniard had the momentum behind him as he dropped just a single game in the final set.
Nadal is anticipating a difficult final against Djokovic's Serbia:
Tennis writer Carole Bouchard gave her take on the inaugural ATP Cup:
John Peers and Chris Guccione were unable to salvage a consolation in the doubles rubber against Feliciano Lopez and Pablo Carreno Busta, despite forcing a match tiebreaker having gone a set down.