Paire managed to claim a hard-fought three-set victory over Dusan Lajovic, winning 6-2, 6-7 (6), 6-4 after two hours and 6 minutes. Djokovic and Viktor Troicki clinched the 2-1 tie victory in a deciding doubles match against France's Nicolas Mahut/Edouard Roger-Vasselin 6-3, 6-7 (5) 10-3. "Thanks to the people for staying to nearly 1 a.m.to support us. He's a great fighter".
Rafael Nadal, the leader, also lives in a team environment.
Nadal has often struggled with injury at this time of year, but he has barely stopped this time around after leading Spain to Davis Cup glory in November.
Novak Djokovic of Serbia in action during his match against Gael Monfils of France during day 4 of the ATP Cup tennis tournament at Pat Rafter Arena in Brisbane, Australia, January 6, 2020. Spain now have two wins from two starts in Group B and will have to face up to undefeated Japan to determine first place and automatic qualification for the Sydney playoffs.
"It was a positive victory", said Nadal.
"I mean, it's tough for them because scheduling has to be respected in terms of play and the Australian Open starts at a certain time, so there's a lot of different things involved". I think I was returning very well from the baseline.
"We will see. I hope it is going to dissipate but if it stays like that, we have a council meeting in a week or 10 days and we will discuss that [air quality measures] for sure if the conditions stay the same".
In other matches of the 24-nation round robin tournament, world No. 1 Rafael Nadal and his Spanish counterpart Roberto Bautista Agut were flawless in Perth, beating Uruguay 3-0.
The six group winners and the two best runners-up qualify for the quarter-finals.
There have been no smoke-related interruptions so far at the ATP Cup, which is taking place in Sydney, Brisbane and Perth, but this week's Canberra challenger event was relocated more than 450km away to Bendigo and some football and basketball matches have been cancelled.
Now ranked at No. 91 in the world, Anderson forced Djokovic to earn it 7-6 (7-5) 7-6 (8-6) in a match that lasted almost two and a half hours.
Japan also edged Georgia 2-1 to also go to 2-0. In the second round, Keys meets local favorite Samantha Stosur. Lajovic pressured a tie-break, the place Paire returned to his assured play, smashing flat backhands and chopping attractive volleys to earn two match factors at 6/4.
Anderson said the goal was now to win the last round of the group stage to have a chance of reaching the quarterfinals.
The 30-year-old Frenchman, who is a holder of three ATP Tour singles titles, already served for the match at 5-4 in the second set, but then started a series of unforced errors that brought his Serbian opponent back into play.