However, the Swiss claimed a tight 4-0 1-4 4-3 (5-4) win in the mixed doubles to claim their fourth Hopman Cup title.
It wasn't until Kerber's third chance that a backhand victor secured the 6-4, 7-6 (8/6) win.
Federer did not find the weather in Perth, where he was playing the Hopman Cup, particularly hot. 'I am not getting the heat thing, this week has not been very hot.
After his victory, Zverev fired a warning to world No 3 Federer, saying: "Hopefully I can do it a little different and give Roger a better match than I did past year".
It was with Maria Sakkari that Federer had a hilarious exchange and just highlighted the parts of his character that makes him such an enjoyable player.
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"We share a lot of tournaments together, but it's not the same as when you play together or share the same court". Zverev said as those inside the stadium roared with laughter.
Roger Federer is not particularly anxious about being affected by the heat at the Australian Open. "If you can raise a attractive Serve-and-Volley game, how I have succeeded, it will have every opponent is hard". But that all out the window once the two let loose in their speeches at the Hopman Cup.
That spray made Federer and Bencic lose it, prompting Zverev to continue playing bad cop.
"First of all, congratulations to you guys again", the world No.4 said with a wry grin, a shrug and a head-shake of resignation.
Federer tried to shift the blame.
"She was fighting until the last one (point)", she said. "If you would have told me that we would have two wins in the group [against] such a great country like Switzerland I would tell you that you are a lier, but yeah we did it, and it is unbelievable". "It's been a super pleasure teaming with Belinda", he added.
Real Madrid was the only choice, says Brahim Diaz
He has quality, magic and dreams of succeeding at this club. "He chose it above others and that energy will help (him)", Perez said.
When he wasn't cracking wise, Zverev was gracious in defeat.
"We came so close - we were one shot away". But the Swiss, nearly as quickly, hit back with a hold and break for the loss of one point, and then worked three break chances, as Federer hovered courtside taking photos.
Something had to give in the meeting between Kerber and Barty, with both players boasting unbeaten singles records at the Hopman Cup prior to their contest.
"He's had a wonderful end to the season beating me and Novak back to back in semis and the final in London", Federer said.
"It's good to finish on a singles performance like this".
Teammate Matt Ebden needed to win his match to keep Australia's hopes alive but went down to Zverev 6-4 6-3.
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The president's visit will come on what will likely be the 20th day of the partial government shutdown . The bills are almost identical to legislation designed by Republicans in the Senate in 2018.
However, this may well be the last Hopman Cup, which is scheduled to be displaced by the new ATP Cup which will overlap with the event from next year.
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