BRISBANE, Australia -- Nick Kyrgios broke Alexander Zverev's service at 3-3 in the deciding set of a 4-6, 6-1, 6-4 win Sunday to give his Australia Green team the winning edge over Germany at the Hopman Cup.
Earlier, Russian-born Daria Gavrilova beat Sabine Lisicki 6-2, 6-2 to give the Australian side an early lead in the mixed teams tournament, which is part of the Australian Open Series before the first Grand Slam of the year begins Jan. 18 at Melbourne Park.
Kyrgios and Gavrilova later combined for a 6-3, 4-6, 10-7 (match tiebreak) win in mixed doubles to complete a 3-0 win.
The 18-year-old Zverev, ranked 83rd, is the youngest player in the top 100 of the ATP rankings.
"I really like the kid," the 20-year-old Kyrgios said. "He's got a great future ahead, and he's a great athlete for his size and moves well and serves big."
For the first time in the Hopman Cup's 28-year history, Australia is being represented by two teams. The Gold team lost to the Czech Republic as Jiri Vesely defeated Lleyton Hewitt, who will retire after the Australian Open, 6-3, 6-7 (1), 6-4.
Karolina Pliskova came from 3-1 down in the second set to beat Jarmila Wolfe Gajdosova 7-5, 6-3.
"Jiri is a quality player and deserved to win, but it was just good to come out here for the first game of the year and get a tough match," Hewitt said. "Hopefully I can come out for the rest of the week now and get better from here to get ready for the rest of the summer."
Hewitt, a two-time Grand Slam champion and former No. 1, has already been named Australia's Davis Cup captain and will be in charge of the team against the United States in the first round of World Group play from March 4-6 at Kooyong in Melbourne.
At the Brisbane International, former Australian Open finalist Dominika Cibulkova overcame Belgium's Yanina Wickmayer by recovering from 4-3 and 0-40 down on her serve in the third set to win 3-6, 6-4, 6-4.
Cibulkova missed four months of competition last year to undergo Achilles tendon surgery. The Slovakian will next face the winner of the first-round match between former No. 1 Jelena Jankovic of Serbia and eighth-seeded Roberta Vinci of Italy.
In other first-round matches Sunday, Switzerland's Timea Bacsinszky became the first seeded player eliminated when she was beaten 6-2, 6-1 by Russia's Anastasia Pavlyuchenkova, a 2013 finalist in Brisbane. American Varvara Lepchenko defeated Slovakia's Anna Schmiedlova 6-2, 6-1 to set up a meeting with last year's Wimbledon finalist, Garbine Muguruza, who is seeded second. In an all-French matchup, Alize Cornet beat Kristina Mladenovic 6-3, 6-4.
Federer might not play until Wednesday, and when he does play, he'll have former No. 3 Ivan Ljubicic as his coach for the first time. The 17-time Grand Slam champion hired the Croatian to work alongside head coach Severin Luthi in 2016 after Stefan Edberg opted to not continue with a third year in Federer's camp.
"What I like about him, he's very direct -- he lets you know what he sees and thinks," Federer told Australian Associated Press. "We train very well together. He's got good insight. He's played against a bunch of players that I've played against. We played against each other over 15 times as well, so he knows my game very well."