Unbeaten in his three singles matches in the tournament prior to the final as he prepared for his Australian Open title defence, the 19-time Grand Slam champion dropped the first set against Zverev, but recovered to win in three sets, 6-7 (4), 6-0, 6-2.
It gave Switzerland a 1-0 lead in the final, with Federer aiming to add to the title he won in Perth with Martina Hingis in 2001.
Just wow from Kerber. Got the break back in the first set and never looked back. Defeats Bencic 6-4, 6-1 to level the final 1-1 for Germany against Switzerland. Down to the mixed doubles now #hopmancup pic.twitter.com/leied42LNK
— Reem Abulleil (@ReemAbulleil) January 6, 2018
Zverev came out all guns blazing in a high-intensity first set where both players produced moments of brilliance, with both holding multiple break points.
However, the young German managed to prevail in the tie-breaker as he aimed to repeat his singles win over Federer at the Hopman Cup last year, when all three sets were decided by tie-breakers.
Federer’s frustration was obvious, dropping his racquet after missing an easy volley and then launching a ball towards the roof.
However, it soon passed as he started to blunt the German’s power and his superior court craft turned the momentum.
Federer took pace off his shots and used the drop shot repeatedly to catch Zverev out, racing through the second set.
The German was the one who lost his cool as the match slipped away, copping a code violation for an audible obscenity after disputing the chair umpire’s decision to replay a Zverev serve in the second set.
Zverev’s serve, and resolve, was broken in the third game of the third set and fittingly it was a Federer drop shot which sealed the win.
“I played great throughout the three sets and Sascha probably dropped his level a little bit in the second and third sets,” he said.
“I was able to put Switzerland ahead so I am very happy.”
Top seed and defending champion Grigor Dimitrov moved into the semi-finals of the season-opening Brisbane International after seeing off a brave challenge from an injured Kyle Edmund on Friday.
Dimitrov was on court for almost two-and-a-half hours before finally subduing the British number two, who was right in the contest until he hurt his ankle with the score at 4-4 in the third set.
Edmund was wrong-footed on the baseline and collapsed to the ground with a scream of pain after turning his ankle.
While the crowd held their breath, fearing the 22-year-old Englishman had done some major damage, Dimitrov hurdled the net and ran to his opponent, eventually helping him hobble off court.
But after having his ankle strapped the Englishman was able to carry on, although his movement appeared restricted.
— Rena (@_irenka23_) January 5, 2018
Angelique Kerber’s early season renaissance continued to flourish on Friday as she led Germany into their first Hopman Cup final since 1995 at the mixed teams tournament in Perth.
The left-hander wound the clock back to 2016 with her menacing forehand as she thrashed Australia’s Daria Gavrilova in straight sets in the singles and then lifted the Germans to victory in the deciding mixed doubles as they notched a dramatic 2-1 win in their final Group A tie.
Kerber and Alexander Zverev only had to beat the Australians to reach Saturday’s final against Switzerland’s Roger Federer and Belinda Bencic.
But it came down to a tense mixed doubles clash after world number four Zverev suffered a shock loss to Thanasi Kokkinakis in the men’s singles.
With Zverev’s form faltering noticeably, the Germans dropped the first set in the Fast4 doubles.
Although they levelled the match, their fate looked grim when Australia led 3-1 in the first-to-five third set tie-breaker, with the in-form Kokkinakis having two serves to come.
But the Germans won the next four points to advance to the final, denying the Belgium pairing of David Goffin and Elise Mertens, who had beaten Canada earlier in the day and would have gone through to the final with an Australian win.
Zverev said Kerber deserved all the plaudits for their place in the final.
“Angie played unbelievable in both her matches,” he said.
“She is the reason we are in the final and I’m going to give her all the credit. I didn’t play very well today.”
The German pairing of Boris Becker and Anke Huber won the final in 1995, with Michael Stich and Steffi Graf winning it two years earlier.
Kerber started 2017 ranked number one in the world but slumped to 21 by the year’s end and on paper appeared to have her work cut out against the 26th-ranked Gavrilova in the singles.
The Australian held four break points in the first game of the match, but it was one-way traffic from there as Kerber produced a procession of winners on her way to an emphatic 6-1, 6-2 victory.
Kerber has won all three of her singles matches at the Hopman Cup and hasn’t dropped a set.
The confidence of 29-year-old is rising as she heads towards Melbourne, where she won her maiden Grand Slam in 2016.
“I am really happy with my three wins,” she said.
“It’s still the beginning of the year, but having good matches under my belt before heading to Melbourne gives me much confidence.”
She will face another player unbeaten in singles this week in Saturday’s final in Bencic, the former world number seven rebuilding her career after injury.
The injury-plagued Kokkinakis is ranked 209th but stunned world number four Zverev, coming from a set down on the back of a booming forehand and superb serving to win 5-7, 7-6 (7/4), 6-4 and keep the tie alive against the odds.
Little separated the pair throughout as they traded blows, with Zverev staving off seven set points in the second set before the Australian levelled the match.
One break in the fifth game of the third set was enough for Kokkinakis to record one of the wins of his career on his third match point.
Zverev beat Federer in three sets, all tie-breakers, in Perth last year.
Earlier in the day, troubled Canadian Eugenie Bouchard suffered an untimely injury setback in her final singles match as Belgium beat Canada 3-0.
Bouchard suffered a buttock injury late in her straight-sets loss to Mertens.
After Mertens beat Bouchard, who produced her best performance of the tournament prior to the injury, world number seven Goffin then cruised past Vasek Pospisil to secure the tie for the Belgians.
They were handed a clean sweep when Bouchard pulled out of the mixed doubles, but it wasn’t quite enough to get them into the final.