Speaking at the Hopman Cup in Perth this week, Federer - who said he had been asked for his opinion on the change by tournament officials - admitted marathon final sets would be missed by some.
"They used to call each other and say "I have this really special kid I'm training" and Darren would say the same [about Hewitt] from Adelaide. He came to play club tennis for my club in Basel, Old Boys Tennis Club", Federer said.
The tear-jerking interview, which has been shared across social media has gained a lot of attention from Federer's fans, who praised to talented player for his respect for his former coach.
When Roger is at the Australian Open, he always invites Peter's parents to watch his matches.
When asked if there was anything further he'd like to say about Carter in view of his life now, he replied: "I think, what I'd like to say is that, I've been incredibly fortunate in having had the right people at the right time; the right coaches at the right time". During an interview with CNN's Christina Macfarlane, the tennis icon broke down into tears while remembering his late coach Peter Carter.
"There's so much that connects me to that country". I guess he didn't want me to be a wasted talent.
Star players Roger Federer and Angelique Kerber have cautiously welcomed new tie-break rules for the deciding set at the Australian Open. "Oh man, I still miss him so much".
In 2019, he'll look to defend his 2018 Australian Open victory, saying Serbian superstar Novak Djokovic is the man to beat.
"The amusing thing is we have four different formats in four Slams, so it is important to remind yourself what's going on and which one it is", said Federer.
When Federer learnt of his coach's death, he ran through the streets "bawling and hysterical". "I think if I can say thank you for my technique today, it's to Peter".
Like Federer, Djokovic has seen enormous success at the Australian Open throughout his career.
Carter died in a auto accident while on honeymoon in South Africa before Federer had won his first major nearly 17 years ago.
"Sure you could argue I made those decisions, but I also got lucky along the way". "We played each other at 14, 16, 20 years old, and who knew we'd be Wimbledon champions and world number ones".
"In terms of who is going to win it, we know who the usual suspects are and I am part of that bunch". "The legends that I admire, the coaches that I've had in Tony Roche and Peter Carter - they've been incredibly inspirational and important to me in my life". I've had another great year.