An inspired Novak Djokovic has led Serbia to victory over Spain in the inaugural ATP Cup final, sparking scenes of ecstasy inside Ken Rosewall Arena.

Djokovic extended his hardcourt mastery over Rafael Nadal with an ominous 6-2 7-6 (7-4) win over the world No.1 before teaming with Victor Troicki to take the deciding doubles rubber 6-3 6-4 over Feliciano Lopez and Pablo Carreno Busta.

Serbia’s stirring fightback, after Roberto Bautista Agut had put Spain 1-0 up in the best-of-three tie with a 7-5 6-1 win over Dusan Lajovic in Sunday night’s opening match, left Djokovic’s army of red, white and blue followers in the stadium overjoyed.

“Novak, Novak, Novak,” they chanted after their hero rallied from a service break down in the opening set of the doubles to reel off six successive games to seize command of the final.

While Nadal pulled out of the doubles, saying he was low on energy after a total of eight singles and doubles matches in nine days, there was no stopping Djokovic despite the world No.2 carrying Serbia with a similar twin workload.

Appearing for the first time in Sydney in a decade, the 16-times grand slam champion said he’d never played in such an atmosphere as he had in front of fervent Serbian fans over the past three days.

Even Nadal, one of the most popular athletes on the planet, found the going too much, at one point offering a sarcastic thumbs up to Serbian spectators after dropping serve.

“Honestly, the crowd was fantastic every single day but sometimes people from some countries, they probably don’t understand how the tennis goes,” Nadal said.

“They think it’s about football or this stuff and atmosphere in tennis is different, no?

“The respect for the players should be there, and at some point I think the respect with small part of the crowd have been not there.”