Zverev won the biggest crown of his career when he overpowered Novak Djokovic at the ATP Finals a year ago, but questions remain over whether this new kid on the block can dismantle the dominance of the big four - Djokovic, Roger Federer, Rafael Nadal and Andy Murray.
"I am not getting the heat thing, this week has not been very hot", he said.
Federer was interviewed by CNN at his training base in Dubai last month about the upcoming season when the topic of Peter Carter, who trained the Swiss legend in his earlier years, came up. I was able to have coaching lessons with him.
"It's just a matter of time when we will see some of them competing in the last stages of Grand Slams", said Djokovic.
"I've been incredibly fortunate to have the right people at the right time, the right coaches at the right time".
"I guess he didn't want me to be a wasted talent".
"And when you start thinking of your family or your friends, you go back in the gym, you go back into the practice courts where there was nobody watching, and all of the sudden you realise we've put in so much work and it all paid off".
"Peter was really, a really important person in my life".
When asked what Carter would have thought about Federer winning 20 major titles, the Swiss was overcome with emotion.
Unfortunately, one year before Federer was to win Wimbledon on 2003, Carter was to die in a auto accident whilst on honeymoon in South Africa.
Prince William accepts Kate Middleton birthday gift on her behalf
While her celebration plans now remain a secret, one thing is certain-her husband definitely didn't forget about the big day. Happy birthday, Kate! Enjoy your time away from the spotlight, no matter how brief.
"I'm one of the top 10 favorites and so are many others", he said. "It was somewhat of a wake-up call for me when he passed away, I really started to train hard", he said.
"Sure you could argue I made those decisions, but I also got lucky along the way".
And Cilic, who pushed Federer all the way in the final previous year, heads into the tournament after pulling out of a warm-up event in India last week with an injured knee.
Federer told CNN it was a career-changing moment.
Federer hasn't lost a match at the Aussie Open since his 2016 semi-final defeat to Djokovic and is going for a third successive title and record seventh in all.
And the Australian tennis calendar, the country's athletes, and the sporting culture as a whole continue to leave an indelible mark in Federer's character.
"Am I confident? I don't know".
They used to call each other and say "I have this really special kid I'm training", he said.
He has remained high atop the men's singles rankings throughout the past two years and he is one of OUR FAVORITES at the upcoming Australian Open.
"I love playing Australia, love playing in Melbourne".