World No. 2 Novak Djokovic pulled double duty in leading Serbia over Spain in the final of the ATP Cup in Sydney on Sunday.

Roberto Bautista Agut opened play with a 7-5, 6-1 victory over Dusan Lajovic to give Spain a 1-0 lead, but Djokovic answered by beating world No. 1 Rafael Nadal 6-2, 7-6 (4) to force the tiebreaker in doubles.

In the deciding match, Djokovic teamed with Viktor Troicki to beat Pablo Carreno Busta and Feliciano Lopez 6-3, 6-4 despite falling behind by a break early.

Trailing 1-3 in the opening set, the Serbian duo reeled off seven straight games to take control of the match.

"I'll remember this experience for the rest of my life as definitely one of the nicest moments in my career," Djokovic said of winning the inaugural event.

Adelaide International

Americans Taylor Fritz, seeded fifth, and Reilly Opelka, seeded eighth, were knocked out in the round of 32 as the main draw got under way in Adelaide, Australia.

Kazakhstan's Alexander Bublik struck 17 aces and saved all five break points he faced in a 6-4, 7-6 (4) win over Fritz, while Pablo Cuevas of Uruguay rallied to beat Opelka 5-7, 7-6 (9), 7-6 (2) in two hours and 18 minutes.

In the day's other match, Serbia's Laslo Djere held off Australian wild-card entry Alexei Popyrin 7-6 (3), 3-6, 6-4.

--Field Level Media

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